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ART002119982
|
oai_dc
|
Some Inclusion Properties of New Subclass of Starlike and Convex Functions associated with Hohlov Operator
|
Some Inclusion Properties of New Subclass of Starlike and Convex Functions associated with Hohlov Operator
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Janusz Sokol(Rzeszow University of Technology ul.); GANGADHARAN. MURUGUSUNDARAMOORTHY(VIT University); Thilagavathi Kothandabani(VIT University)"
] |
For a sufficiently adequate specialcase of the Dziok?Srivastava linear operator defined by means ofthe Hadamard product (or convolution) with Srivastava-Wrightconvolution operator, the authors investigate several mappingproperties involving various subclasses of analytic and univalentfunctions,$G(\lambda,\alpha)$ and$M(\lambda,\alpha).$ Furthermore we discuss some inclusion relationsfor these subclasses to be in the classes of $k$-uniformly convexand $k$-starlike functions.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002119983
|
oai_dc
|
Translating integer factoring into graph coloring
|
Translating integer factoring into graph coloring
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"젠슨, 토미 르네(경북대학교)"
] |
This paper gives for every positive integer $n$an explicit construction of a graph $G$ with fewer than$15\log^2n - \frac{5}{2}\log n +28$ vertices, such thatthere exists a nontrivial factoring of $n$ if and only if$G$ is 3-colorable.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002119984
|
oai_dc
|
Semi-Slant Lightlike Submanifolds of Inde nite Sasakian Manifolds
|
Semi-Slant Lightlike Submanifolds of Inde nite Sasakian Manifolds
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Akhilesh Yadav(University of Allahabad, India); Shiv Sharma Shukla(University of Allahabad, India)"
] |
In this paper, we introduce the notion of semi-slant lightlike submanifolds ofindefinite Sasakian manifolds giving characterization theorem with some non-trivial examplesof such submanifolds. Integrability conditions of distributions D1, D2 and RadTM onsemi-slant lightlike submanifolds of an indefinite Sasakian manifold have been obtained.
We also obtain necessary and sufficient conditions for foliations determined by above distributionsto be totally geodesic.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002119961
|
oai_dc
|
An error embedded Runge-Kutta method for initial value problems
|
An error embedded Runge-Kutta method for initial value problems
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"부선영(홍익대학교); 김필수(경북대학교); 정원규(Dongwoo Fine-Chem,Korea)"
] |
In this paper, we propose an error embedded Runge-Kutta method to improvethe traditional embedded Runge-Kutta method. The proposed scheme can be applied intomost explicit embedded Runge-Kutta methods. At each integration step, the proposedmethod is comprised of two equations for the solution and the error, respectively. Thesesolution and error are obtained by solving an initial value problem whose solution hasthe information of the error at each integration step. The constructed algorithm controlsboth the error and the time step size simultaneously and possesses a good performancein the computational cost compared to the original method. For the assessment of theeffectiveness, the van der Pol equation and another one having a difficulty for the global
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002119962
|
oai_dc
|
Korobov Polynomials of the Fifth Kind and of the Sixth Kind
|
Korobov Polynomials of the Fifth Kind and of the Sixth Kind
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Toufik Mansour(University of Haifa); 김대산(서강대학교); 김태균(광운대학교); Hyuck In Kwon(Kwangwoon University, Korea)"
] |
Recently, Korobov polynomials have been received a lot of attention, whichare discrete analogs of Bernoulli polynomials. In particular, these polynomials are used toderive some interpolation formulas of many variables and a discrete analog of the Eulersummation formula. In this paper, we extend these family of polynomials to consider theKorobov polynomials of the fth kind and of the sixth kind. We present several explicitformulas and recurrence relations for these polynomials. Also, we establish a connectionbetween our polynomials and several known families of polynomials.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002119963
|
oai_dc
|
Posner's First Theorem for ∗-ideals in Prime Rings with Involution
|
Posner's First Theorem for ∗-ideals in Prime Rings with Involution
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Mohammad Ashraf(Aligarh Muslim University); Mohammad Aslam Siddeeque(Aligarh Muslim University)"
] |
Posner’s first theorem states that if R is a prime ring of characteristic differentfrom two, d1 and d2 are derivations on R such that the iterate d1d2 is also a derivation ofR, then at least one of d1, d2 is zero. In the present paper we extend this result to -primerings of characteristic different from two.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002119964
|
oai_dc
|
On the Numbers of Palindromes
|
On the Numbers of Palindromes
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"이자은(영남대학교); Sejeong Bang(Yeungnam University, Korea); Yan-Quan Feng(Beijing Jiaotong University)"
] |
For any integer $n\geq 2$, each palindrome of $n$ induces a circulant graph of order $n$.
It is known that for each integer $n\geq 2$, there is a one-to-one correspondence between the set of(resp. aperiodic) palindromes of $n$ and the set of (resp. connected) circulant graphs of order $n$ (cf. \cite{bbkl}).
This bijection gives a one-to-one correspondence of the palindromes $\sigma$ with $\gcd(\sigma)=1$ to the connected circulant graphs.
It was also shown that the number of palindromes $\sigma$ of $n$ with $\gcd(\sigma)=1$is the same number of aperiodic palindromes of $n$.
Let $a_n$ (resp. $b_n$) be the number of aperiodic palindromes $\sigma$ of $n$ with $\gcd(\sigma)=1$(resp. $\gcd(\sigma)\neq 1$). Let $c_n$ (resp. $d_n$) be the number of periodic palindromes$\sigma$ of $n$ with $\gcd(\sigma)=1$ (resp. $\gcd(\sigma)\neq 1$).
In this paper, we calculate the numbers $a_n,b_n,c_n, d_n$ in two ways. In Theorem 2.3,we find recurrence relations for $a_n,b_n,c_n, d_n$ in terms of $a_d$ for $d|n$ and $d\neq n$.
Afterwards, we find formulae for $a_n,~b_n,~c_n,~d_n$ explicitly in Theorem 2.5.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002119965
|
oai_dc
|
On Deferred Statistical Convergence of Sequences
|
On Deferred Statistical Convergence of Sequences
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Mehme Kucukaslan(Mersin University, Turkey); Mujde Yimazturk(Mersin University, Turkey)"
] |
In this paper, deferred statistical convergence is de ned by using deferredCesaro mean instead of Ces aro mean in the de nition of statistical convergence. The obtainedmethod is compared with strong deferred Ces aro mean and statistical convergenceunder some certain assumptions. Also, some inclusion theorems and examples are given.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002119966
|
oai_dc
|
Some Properties of (p, q) - Lucas Number
|
Some Properties of (p, q) - Lucas Number
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Alongkot Suvarnamani(Rajamangala University, Thailand)"
] |
n this paper, we consider the generalized Lucas sequence which is the (p, q)- Lucas sequence. Then we used the Binet's formula to show some properties of the (p, q)- Lucas number. We get some generalized identities of the (p, q) - Lucas number.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002119967
|
oai_dc
|
Subalgebras and Ideals of BCK/BCI-Algebras in the Framework of the Hesitant Intersection
|
Subalgebras and Ideals of BCK/BCI-Algebras in the Framework of the Hesitant Intersection
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"YOUNG BAE JUN(경상대학교)"
] |
Using the hesitant intersection ($\Cap$), the notions of $\Cap$-hesitant fuzzy subalgebras, $\Cap$-hesitant fuzzy ideals and $\Cap$-hesitant fuzzy $p$-ideals are introduced,and their relations and relatedproperties are investigated. Conditions for a $\Cap$-hesitant fuzzy ideal to be a $\Cap$-hesitant fuzzy $p$-ideal are provided. The extension property for $\Cap$-hesitant fuzzy $p$-ideals is established.}
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002119968
|
oai_dc
|
Strongly Clean Matrices Over Power Series
|
Strongly Clean Matrices Over Power Series
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Handan Kose(Ahi Evran University); Huanyin Chen(Hangzhou Normal University); Yosum Kurtulmaz(Bilkent University)"
] |
An $n\times n$ matrix $A$ over a commutative ring is strongly clean provided that it can be written as the sumof an idempotent matrix and an invertible matrix that commute. Let $R$ be an arbitrary commutative ring, and let $A(x)\in M_n\big(R[[x]]\big)$. We prove, in this note, that $A(x)\in M_n\big(R[[x]]\big)$ is strongly clean if and only if $A(0)\in M_n(R)$ is strongly clean. Strongly clean matricesover quotient rings of power series are also determined.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002119969
|
oai_dc
|
Derivations with Power Values on Lie Ideals in Rings and Banach Algebras
|
Derivations with Power Values on Lie Ideals in Rings and Banach Algebras
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Mohd Arif Raza(Aligarh Muslim University, India); Nadeem ur Rehman(Taibah University, KSA); Najat Mohammed Muthana(King Abdulaziz University,KSA)"
] |
Let $R$ be a $2$-torsion free prime ring with center $Z$, $U$ be the Utumi quotient ring, $Q$ be the Martindale quotient ring of $R$, $d$ be a derivation of $R$ and $L$ be a Lie ideal of $R$. If $d(uv)^n=d(u)^md(v)^l$ or $d(uv)^n=d(v)^ld(u)^m$ for all $u,v\in L$, where $m,n,l$ are fixed positive integers, then $L \subseteq Z$. We also examine the case when $R$ is a semiprime ring. Finally, as an application we apply our result to the continuous derivations on non-commutative Banach algebras. This result simultaneously generalizes a number of results in the literature.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002119970
|
oai_dc
|
Two Variants of the Reciprocal Super Catalan Matrix
|
Two Variants of the Reciprocal Super Catalan Matrix
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Nese Omur(Kocaeli University, Turkey); Emrah Kilic(TOBB University, Turkey); Sibel Koparal(Kocaeli University, Turkey); Yucel Turker Ulutas(Kocaeli University, Turkey)"
] |
In this paper, we define two kinds variants of the super Catalan matrix as wellas their q-analoques. We give explicit expressions for LU-decompositions of these matricesand their inverses.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002119971
|
oai_dc
|
Positive Solutions for Three-point Boundary Value Problem of Nonlinear Fractional q-difference Equation
|
Positive Solutions for Three-point Boundary Value Problem of Nonlinear Fractional q-difference Equation
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Wengui Yang(Sanmenxia Polytechnic, China.)"
] |
In this paper, we investigate the existence and uniqueness of positive solu-tions for three-point boundary value problem of nonlinear fractional q-di erence equation.
Some existence and uniqueness results are obtained by applying some standard xed pointtheorems. As applications, two examples are presented to illustrate the main results.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002119972
|
oai_dc
|
Existence and Stability Results on Nonlinear Delay Integro-Differential Equations with Random Impulses
|
Existence and Stability Results on Nonlinear Delay Integro-Differential Equations with Random Impulses
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Arumugam Vinodkumar(Amrita Vishwa Vidyapeetham University, India); Muthusamy Gowrisankar(Annapoorana Engineering College,India); Prathiban Mohankumar(A. C. T College, India)"
] |
In this paper, the existence, uniqueness, stability via continuous dependenceand Ulam stabilities of nonlinear integro-differential equations with random impulses arestudied under sufficient condition. The results are obtained by using Leray-Schauder alternativefixed point theorem and Banach contraction principle.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002119973
|
oai_dc
|
A Further Result Related to a Conjecture of R. Bruck
|
A Further Result Related to a Conjecture of R. Bruck
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Lian-Zhong Yang(Shandong University); Nan Li(University of Jinan, P. R. China); Kai Liu(Nanchang University, P.R. China)"
] |
In this paper, we investigate the uniqueness problem of a meromorphic functionsharing one small function with its differential polynomial, and give a result which isrelated to a conjecture of R. Br¨uck.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002119974
|
oai_dc
|
Some Finite Integrals Involving Srivastava's Polynomials and the Aleph Function
|
Some Finite Integrals Involving Srivastava's Polynomials and the Aleph Function
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Alok Bhargava(Jaipur Engineering College, India); Amber Srivastava(Swami Keshvanand Institute of Technology, India); Rohit Mukherjee(Swami Keshvanand Institute of Technology)"
] |
In this paper, we establish certain integrals involving Srivastava’s Polynomials[5] and Aleph Function ([8], [10]). On account of general nature of the functionsand polynomials involved in the integrals, our results provide interesting unifications andgeneralizations of a large number of new and known results, which may find useful applicationsin the field of science and engineering. To illustrate, we have recorded some specialcases of our main results which are also sufficiently general and unified in nature and areof interest in themselves.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002119975
|
oai_dc
|
Recursion Formulas for Exton's triple Hypergeometric Functions
|
Recursion Formulas for Exton's triple Hypergeometric Functions
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Vivek Sahai(Lucknow University, India); Ashish Verma(Lucknow University, India)"
] |
This paper continues the study of recursion formulas of multivariable hyper-geometric functions. Earlier, in [4], the authors have given the recursion formulas for threevariable Lauricella functions, Srivastava's triple hypergeometric functions and k{variableLauricella functions. Further, in [5], we have obtained recursion formulas for the generaltriple hypergeometric function. We present here the recursion formulas for Exton's triplehypergeometric functions.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002119976
|
oai_dc
|
Behavior of Solutions of a Fourth Order Difference Equation
|
Behavior of Solutions of a Fourth Order Difference Equation
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Raafat Abo-Zeid(The Valley Higher Institute for Engineering, Egypt)"
] |
In this paper, we introduce an explicit formula for the solutions and discuss the global behavior of solutions of the difference equation$$x_{n+1}=\frac{ax_{n-3} }{b- cx_{n-1}x_{n-3}},\qquad n=0,1,\ldots $$where $a,b,c$ are positive real numbers and the initial conditions $x_{-3},x_{-2},x_{-1},x_0$ are real numbers.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002119977
|
oai_dc
|
Existence and Exponential Stability for a Thermoviscoelastic Equation with Boundary Output Feedback Control
|
Existence and Exponential Stability for a Thermoviscoelastic Equation with Boundary Output Feedback Control
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Yong Han Kang(Catholic University of Daegu)"
] |
In this paper, we consider a thermoviscoelastic equation which has one endfixed and output feedback control at the other end. We prove the existence of solutionsusing the Galerkin method and then investigate the exponential stability of solutions byusing multiplier technique.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002119978
|
oai_dc
|
Controllability and Observability of Sylvester Matrix Dynamical Systems on Time Scales
|
Controllability and Observability of Sylvester Matrix Dynamical Systems on Time Scales
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Bhogapurapu Venkata Appa Rao(K L University, India); Krosuri Anjaneya Siva Naga Vara P.(Krishna University, India)"
] |
In this paper, we obtain solution for the first order matrix dynamical systemand also we provide set of necessary and sufficient conditions for complete controllabilityand complete observability of the Sylvester matrix dynamical system.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002119979
|
oai_dc
|
Jacobi Operators with Respect to the Reeb Vector Fields on Real Hypersurfaces in a Non at Complex Space Form
|
Jacobi Operators with Respect to the Reeb Vector Fields on Real Hypersurfaces in a Non at Complex Space Form
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Hiroyuki Kurihara(Ibaraki University, Japan); U-Hang Ki(The National Academy of Sciences,); Soo Jin Kim(Chosun University, Korea)"
] |
Let $M$ be a real hypersurface of a complex space form with almostcontact metric structure $(\phi, \xi, \eta, g)$. In this paper, weprove that if the structure Jacobi operator $R_\xi=R(\cdot,\xi)\xi$ is$\phi\nabla_{\xi} \xi$-parallel and $R_{\xi}$ commute with thestructure tensor $\phi$, then $M$ is a homogeneous real hypersurface ofType A provided that Tr$R_{\xi}$ is constant.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002119980
|
oai_dc
|
Equivalence of Z4-actions on Handlebodies of Genus g
|
Equivalence of Z4-actions on Handlebodies of Genus g
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Jesse Prince-Lubawy(University of North Alabama, Alabama)"
] |
In this paper we consider all orientation-preserving $\mathbb{Z}_{4}$-actions on $3$-dimensional handlebodies $V_g$ of genus $g>0$. We study the graph of groups $(\Gamma($v$),\mathbf{G(v)})$, which determines a handlebody orbifold $V(\Gamma($v$),{\mathbf{G(v)}})\simeq{V_g}/\mathbb{Z}_{4}$. This algebraic characterization is used to enumerate the total number of $\mathbb{Z}_{4}$ group actions on such handlebodies, up to equivalence.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002119981
|
oai_dc
|
Areas associated with a Strictly Locally Convex Curve
|
Areas associated with a Strictly Locally Convex Curve
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"김동수(전남대학교); 김영호(경북대학교); 김동서(전남대학교); 배현선(조선대학교)"
] |
Archimedes showed that for a point P on a parabola X and a chord AB of Xparallel to the tangent of X at P, the area S of the region bounded by the parabola X andchord AB is four thirds of the area T of triangle △ABP. It is well known that the areaU formed by three tangents to a parabola is half of the area T of the triangle formed byjoining their points of contact. Recently, the first and third authors of the present paperand others proved that among strictly locally convex curves in the plane R2, these twoproperties are characteristic ones of parabolas.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002153124
|
oai_dc
|
Inversion-like and Major-like Statistics of an Ordered Partition of a Multiset
|
Inversion-like and Major-like Statistics of an Ordered Partition of a Multiset
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"최승일(서울대학교)"
] |
Given a partition $\ld=(\ld_1, \ld_2, \ldots, \ld_l)$ of a positive integer $n$,let ${\rm Tab}(\ld,k)$ be the set of all tabloids of shape $\ld$ whose weightsrange over the set of all $k$-compositions of $n$and $\mathcal{OP}_{\ld^{\rm rev}}^k$ the set of all ordered partitions into $k$ blocksof the multiset $\{1^{\ld_l}2^{\ld_{l-1}}\cdots l^{\ld_1}\}$.
In \cite{B}, Butler introduced an inversion-like statistic on ${\rm Tab}(\ld,k)$to show that the rank-selected M\"{o}bius invariantarising from the subgroup lattice of a finite abelian $p$-group of type $\ld$has nonnegative coefficients as apolynomial in $p$.
In this paper, we introduce an inversion-like statistic on the set of orderedpartitions of a multiset and construct an inversion-preserving bijection between${\rm Tab}(\ld,k)$ and $\mathcal{OP}_{\hat \ld}^k$.
When $k=2$, we also introduce a major-like statistic on ${\rm Tab}(\ld,2)$and study its connection to the inversion statistic due to Butler.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002153125
|
oai_dc
|
Note on Cellular Structure of Edge Colored Partition Algebras
|
Note on Cellular Structure of Edge Colored Partition Algebras
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"A. Joseph Kennedy(Pondicherry University, Pondicherry, India); G. Muniasamy(MIT, Anna University, Chennai, India)"
] |
In this paper, we study the cellular structure of the $G$-edge colored \linebreak partition algebras, when $G$ is a finite group. Further, we classified all the irreducible representations of these algebras using their cellular structure whenever $G$ is \linebreak a finite cyclic group. Also we prove that the $\mathbb{Z}/r \mathbb{Z}$-Edge colored partition algebras are quasi-hereditary over a field of characteristic zero which contains a primitive $r^{th}$ root of unity.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002153129
|
oai_dc
|
A Generalization of Formal Local Cohomology Modules
|
A Generalization of Formal Local Cohomology Modules
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Shahram Rezaei(Payame Noor University, Iran)"
] |
Let $\fa$ and $\fb$ be two ideals of a commutative Noetherian ring $R$, $M$ a finitely generated $R$-module and $ i $ an integer.
In this paper we study formal local cohomology modules with respect to a pair of ideals. We denote the $ i $-th $ \fa $-formal local cohomology module $M$ with respect to $\fb$ by $ \mathfrak{F}_{\fa, \fb}^i(M) $. We show that if $ \mathfrak{F}_{\fa, \fb}^i(M) $ is artinian, then $\fa \subseteq \sqrt{(0: \mathfrak{F}_{\fa, \fb}^i(M))}$. Also, we show that $ \mathfrak{F}_{\fa, \fb}^{\di M} (M) $ is artinian and we determine the set $\Att_R\mathfrak{F}_{\fa, \fb}^{\di M} (M)$.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002153130
|
oai_dc
|
Effect of Open Packing upon Vertex Removal
|
Effect of Open Packing upon Vertex Removal
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Soundararajan Saravanakumar(The Madura College, India); Ismail Sahul Hamid(The Madura College, India)"
] |
Let $\fa$ and $\fb$ be two ideals of a commutative Noetherian ring $R$, $M$ a finitely generated $R$-module and $ i $ an integer.
In this paper we study formal local cohomology modules with respect to a pair of ideals. We denote the $ i $-th $ \fa $-formal local cohomology module $M$ with respect to $\fb$ by $ \mathfrak{F}_{\fa, \fb}^i(M) $. We show that if $ \mathfrak{F}_{\fa, \fb}^i(M) $ is artinian, then $\fa \subseteq \sqrt{(0: \mathfrak{F}_{\fa, \fb}^i(M))}$. Also, we show that $ \mathfrak{F}_{\fa, \fb}^{\di M} (M) $ is artinian and we determine the set $\Att_R\mathfrak{F}_{\fa, \fb}^{\di M} (M)$.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002153126
|
oai_dc
|
When the Comaximal Graph of a Lattice is Toroidal
|
When the Comaximal Graph of a Lattice is Toroidal
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Kazem Khashyarmanesh(Internatinal Compus of Ferdowsi University); Mojgan Afkhami(University of Neyshabur); Khadijeh Ahmad Javaheri(Internatinal Compus of Ferdowsi Universi)"
] |
In this paper we investigate the toroidality of the comaximal graphof a finite lattice.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002153131
|
oai_dc
|
On the Invariant of Chen-Kuan for Abelian Varieties
|
On the Invariant of Chen-Kuan for Abelian Varieties
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"문현숙(경북대학교)"
] |
Let $A$ be an abelian variety over a global field $K$.
We show that, in ``many'' cases,Chen-Kuan's invariant $M(A[n])$,that is the average number of $n$-torsion pointsof $A$ over various residue fields of $K$, hasthe minimal possible value.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002153132
|
oai_dc
|
Uniqueness of Entire Functions that Share an Entire Function of Smaller Order with One of Their Linear Differential Polynomials
|
Uniqueness of Entire Functions that Share an Entire Function of Smaller Order with One of Their Linear Differential Polynomials
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Xiao-Min Li(Ocean University Of China); Hong-Xun Yi(Shandong University, China)"
] |
We prove a uniqueness theorem of entirefunctions sharing an entire function of smaller order with their linear differential polynomials. The results in this paper improve the corresponding results given by Gundersen-Yang[4], Chang-Zhu[3], and others. Some examples are provided to show that the results inthis paper are best possible.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002153133
|
oai_dc
|
Oscillation of Second-Order Nonlinear Forced Functional Dynamic Equations with Damping Term on Time Scales
|
Oscillation of Second-Order Nonlinear Forced Functional Dynamic Equations with Damping Term on Time Scales
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Hassan Ahmed Agwa(Ain Shams University); Ahmed Mahmoud Khodier(Ain Shams University); Heba Mostaafa Atteya Ahmed(Ain Shams University)"
] |
In this paper, we establish some new oscillation criteria for the second-order forced nonlinear functional dynamic equations with damping term
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002153134
|
oai_dc
|
The Geometry of the Space of Symmetric Bilinear Forms on R2 with Octagonal Norm
|
The Geometry of the Space of Symmetric Bilinear Forms on R2 with Octagonal Norm
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"김성권(경북대학교)"
] |
Let $d_{*}(1, w)^2= \mathbb{R}^2$with the octagonal norm of weight $w$. It is the two dimensionalreal predual of Lorentz sequence space. In this paper we classifythe smooth points of the unit ball of the space of symmetricbilinear forms on $d_{*}(1, w)^2$. We also show that the unitsphere of the space of symmetric bilinear forms on $d_{*}(1,w)^2$ is the disjoint union of the sets of smooth points, extremepoints and the set $A$ as follows:$$S_{{\mathcal L}_s(^2d_{*}(1, w)^2)}=smB_{{\mathcalL}_s(^2d_{*}(1, w)^2)}\bigcup extB_{{\mathcal L}_s(^2d_{*}(1,w)^2)}\bigcup A,$$ where the set $A$ consists of$ax_1x_2+by_1y_2+c(x_1y_2+x_2y_1)$ with $(a=b=0,c=\pm\frac{1}{1+w^2})$, $(a\neq b, ab\geq 0, c=0)$, $(a=b, 0<ac,0<|c|< |a|)$, $(a\neq |c|, a=-b, 0<ac, 0<|c|)$, $(a=\frac{1-w}{1+w},b=0, c=\frac{1}{1+w})$, $(a=\frac{1+w+w(w^2-3)c}{1+w^2},b=\frac{w-1+(1-3w^2)c}{w(1+w^2)}, \frac{1}{2+2w}<c<\frac{1}{(1+w)^2(1-w)}, c\neq \frac{1}{1+2w-w^2})$,$(a=\frac{1+w(1+w)c}{1+w}, b=\frac{-1+(1+w)c}{w(1+w)}, 0<c<\frac{1}{2+2w})$~ \mbox{or}~ $(a=\frac{1-w(1+w)c}{1+w},b=\frac{1-(1+w)c}{1+w}, \frac{1}{1+w}< c<\frac{1}{(1+w)^2(1-w)}).$
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002153135
|
oai_dc
|
G-vector-valued Sequence Space Frames
|
G-vector-valued Sequence Space Frames
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Elnaz Osgooei(Urmia University of Technology)"
] |
G-vector-valued sequence spaceframes and g-Banach frames for Banach spaces are introduced andstudied in this paper. Also, the concepts of duality mapping and$\beta$-dual of a BK-space are used to define frame mapping andsynthesis operator of these frames, respectively. Finally, someresults regarding the existence of g-vector-valued sequence spaceframes and g-Banach frames are obtained. In particular, it is provedthat if $X$ is a separable Banach space and $Y$ is a Banach spacewith a Schauder basis, then there exist a $Y$-valued sequence space$Y_{v}$ and a g-Banach frame for $X$ with respect to $Y$ and$Y_{v}$.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002153136
|
oai_dc
|
ϵ-Compatible Maps and Common Fixed Point Theorems
|
ϵ-Compatible Maps and Common Fixed Point Theorems
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Subramanian Muralisankar(Madurai Kamaraj University); Karupphia Jeyabal(Madurai Kamaraj University)"
] |
The aim of this paper is to introduce the notion of $\epsilon$-compatible maps and obtain some common fixed point theorems. Also, our results generalize some well known fixed point theorems.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002153137
|
oai_dc
|
On the Order of Growth of Solutions to Complex Nonhomogeneous Linear Differential Equations
|
On the Order of Growth of Solutions to Complex Nonhomogeneous Linear Differential Equations
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Benharrat Belaidi(Laboratory of Pure and Applied Mathematics); Habib Habib(University of Sidi Bel)"
] |
In this paper, we study the order ofgrowth of solutions to the non-homogeneous linear differential equation\begin{equation*}f^{\left( k\right) }+A_{k-1}e^{az}f^{\left( k-1\right) }+\cdots+A_{1}e^{az}f^{\prime }+A_{0}e^{az}f=F_{1}e^{az}+F_{2}e^{bz},\end{equation*}where $A_{j}\left( z\right) $ $\left( \not\equiv 0\right) $ $\left(j=0,1,\cdots ,k-1\right) $, $F_{j}\left( z\right) $ $\left( \not\equiv0\right) $ $\left( j=1,2\right) $ are entire functions and $a$, $b$ arecomplex numbers such that $ab\left( a-b\right) \neq 0$.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002153138
|
oai_dc
|
Complex Dynamic Behaviors of an Impulsively Controlled Predator-prey System with Watt-type Functional Response
|
Complex Dynamic Behaviors of an Impulsively Controlled Predator-prey System with Watt-type Functional Response
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"백헌기(대구가톨릭대학교)"
] |
In this paper, we consider a discrete predator-prey system with Watt-type functional response and impulsive controls. First, we find sufficient conditions for stability of a prey-free positive periodic solution of the system by using the Floquet theory and then prove the boundedness of the system. In addition, a condition for the permanence of the system is also obtained. Finally, we illustrate some numerical examples to substantiate our theoretical results, and display bifurcation diagrams and trajectories of some solutions of the system via numerical simulations, which show that impulsive controls can give rise to various kinds of dynamic behaviors.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002153139
|
oai_dc
|
Hermite-Hadamard-Fejer Type Inequalities for Harmonically Quasi-convex Functions via Fractional Integrals
|
Hermite-Hadamard-Fejer Type Inequalities for Harmonically Quasi-convex Functions via Fractional Integrals
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Mehmet Kunt(Karadeniz Technical University); Imdat Iscan(Gireson University)"
] |
In this paper, some Hermite-Hadamard-Fej%\'{e}r type integral inequalities for harmonically quasi-convex functions infractional integral forms have been obtained.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002153140
|
oai_dc
|
On Left SF-Rings and Strongly Regular Rings
|
On Left SF-Rings and Strongly Regular Rings
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Ardeline Mary Buhphang(North Eastern Hill University); Tikaram Subedi(North Eastern Hill University)"
] |
A ring R called left SF if its simple left modules are flat. Regular rings are known to be left SF-rings. However, till date it is unknown whether a left SF-ring is necessarily regular. In this paper, we prove the strong regularity of left (right) complement bounded left SF-rings. We also prove the strong regularity of a class of generalized semicommutative left SF-rings.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002153141
|
oai_dc
|
On Certain Subclasses of Starlike p-valent Functions
|
On Certain Subclasses of Starlike p-valent Functions
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Soliman Mohammed Soileh(Mansoura University); Hanan Elsayed Darwish(Mansoura University); Abd-el Monem Yousof Lashin(Mansoura University)"
] |
The object of the present paper is toinvestigate the starlikeness of the class of functions $f(z)=z^{p}+\sum%\limits_{k=n}^{\infty }a_{p+k}z^{p+k}\ (p,n\in \mathbb{N} =\left\{ 1,2,...\right\} )\ $which are analytic and $p-$valent in the unitdisc $U$ and satisfy the condition\begin{equation*}\left\vert (1-\lambda )(\frac{f(z)}{z^{p}})^{\alpha }+\lambda \frac{%zf^{^{\prime }}(z)}{pf(z)}(\frac{f(z)}{z^{p}})^{\alpha }-1\right\vert <\mu \\ \left( 0<\mu \leq 1,\lambda \geq 0,\alpha >0,z\in U\right) .
\end{equation*}
The starlikeness of certain integral operator are also discussed. Theresults obtained generalize the related works of some authors and some othernew results are also obtained.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002153128
|
oai_dc
|
Strongly Prime Ideals and Primal Ideals in Posets
|
Strongly Prime Ideals and Primal Ideals in Posets
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Balasubramanian Elavarasan(Karunya University, India); Catherine Grace(Karunya University, India)"
] |
In this paper, we study and establish some interesting results of ideals in a poset. It is shown that for a nonzero ideal $I$ of a poset $P$, there are at most two strongly prime ideals of $P$ that are minimal over $I$. Also, we study the notion of primal ideals in a poset and the relationship among the primal ideals and strongly prime ideals is considered.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002153142
|
oai_dc
|
Szasz-Kantorovich Type Operators Based on Charlier Polynomials
|
Szasz-Kantorovich Type Operators Based on Charlier Polynomials
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Arun Kajla(Indian Institute of Technology Roorkee); Purshottam Narain Agrawal(Indian Institute of Technology Roorkee)"
] |
In the present article, we study some approximation properties of the Kantorovich type generalization of Sz\'{a}sz type operators involving Charlier polynomials introduced by S. Varma and F. Ta\c{s}delen (Math. Comput. Modelling, 56 (5-6) (2012) 108-112). First, we establish approximation in a Lipschitz type space, weighted approximation theorems and $A$-statistical convergence properties for these operators. Then, we obtain the rate of approximation of functions having derivatives of bounded variation.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002153143
|
oai_dc
|
On Semi-cubically Hyponormal Weighted Shifts with First Two Equal Weights
|
On Semi-cubically Hyponormal Weighted Shifts with First Two Equal Weights
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"정일봉(경북대학교); 백승환(경북대학교); George R. Exner, Young Soo Jo, and Il Bong Jung(George R. ExnerDepartment of Mathematics BucknellMathematics College of Natural Sciences Keimyung Un)"
] |
It is known that a semi-cubically hyponormal weighted shift need not satisfythe flatness property, in which equality of two weights forces all or almost all weights to be equal.
So it is a natural question to describe allsemi-cubically hyponormal weighted shifts $W_{\alpha }$ with first two weights equal.
Let $\alpha :1,1,\sqrt{x},(\sqrt{u},\sqrt{v},\sqrt{w})^{\wedge }$be a backward 3-step extension of a recursively generated weight sequencewith $1<x<u<v<w$ and let $W_{\alpha }$ be the associated weighted shift.
In this paper we characterize completely thesemi-cubical hyponormal $W_{\alpha }$ satisfying the additional assumption of thepositive determinantcoefficient property, which result is parallel to results for quadratichyponormality.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002153144
|
oai_dc
|
nth-order q-derivatives of Srivastava’s General Triple q-hypergeometric Series with Respect to Parameters
|
nth-order q-derivatives of Srivastava’s General Triple q-hypergeometric Series with Respect to Parameters
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Vivek Sahai(Lucknow University, India); Ashish Verma(Lucknow University, India)"
] |
We obtain $q$--derivatives of Srivastava's general triple $q$-hypergeometric series with respect to its parameters. The particular cases leading to results for three Srivastava's triple $q$--hypergeometric series $H_{A, q}$, $H_{B, q}$ and $H_{C, q}$ are also considered.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002153145
|
oai_dc
|
Monodromy Maps of Fibered 2-Bridge Knots as Elements in Automorphism Groups of Free Groups
|
Monodromy Maps of Fibered 2-Bridge Knots as Elements in Automorphism Groups of Free Groups
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Masaaki Suzuki(Meiji University); Hiroshi Goda(Tokyo University of Agriculture and Technology)"
] |
In this note,we study a monodromy map of a fibered $2$-bridge knot.
We show the monodromy mapof a fibered $2$-bridge knotas an element in the automorphism group of a free group.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002153146
|
oai_dc
|
A New Type of Helix Constructed by Plane Curves
|
A New Type of Helix Constructed by Plane Curves
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"최진호(울산대학교)"
] |
In this paper, we give an algorithm to construct a space curve in Euclidean 3-space $\mathbb{E}^3$ from a plane curve which is called PDP-helix of order $d$.
The notion of the PDP-helices is a generalization of a general helix and a slant helix in $\mathbb{E}^3$.
It is naturally shown that the PDP-helix of order 1 and order 2 are the same as the general helix and the slant helix, respectively.
We give a characterization of the PDP-helix of order $d$. Moreover, we study some geometric properties of that of order 3.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002153147
|
oai_dc
|
On Concircular Curvature Tensor with respect to the Semisymmetric Non-metric Connection in a Kenmotsu Manifold
|
On Concircular Curvature Tensor with respect to the Semisymmetric Non-metric Connection in a Kenmotsu Manifold
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Abdul Haseeb(Jazan University)"
] |
The objective of the present paper is to study some new results on concircular curvature tensor in a Kenmotsu manifold with respect to the semi-symmetric non-metric connection.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002153148
|
oai_dc
|
Contact CR-Warped product Submanifolds in Cosymplectic Manifolds
|
Contact CR-Warped product Submanifolds in Cosymplectic Manifolds
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"MEHMET ATC≫EKEN(Gaziosmanpasa University,TURKEY)"
] |
The aim of this paper is to study thegeometry of contact CR-warped product submanifolds in a cosymplecticmanifold. We search several fundamental properties of contactCR-warped product submanifolds in a cosymplectic manifold. We alsogive necessary and sufficient conditions for a submanifold in acosymplectic manifold to be contact CR-(warped) product submanifold.
After then we establish a general inequality between the warpingfunction and the second fundamental for a contact CR-warped productsubmanifold in a cosymplectic manifold and consider contactCR-warped product submanifold in a cosymplectic manifold whichsatisfy the equality case of the inequality and some new results areobtained.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002153127
|
oai_dc
|
On Some Modular Equations in the Spirit of Ramanujan
|
On Some Modular Equations in the Spirit of Ramanujan
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Belakavadi Radhakrishna Srivatsa Kumar(Manipal University, India)"
] |
In this paper, we establish some new $P$-$Q$ type modular equations, by using the modular equations given by Srinivasa Ramanujan.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002153149
|
oai_dc
|
Z Tensor on N(k)-Quasi-Einstein Manifolds
|
Z Tensor on N(k)-Quasi-Einstein Manifolds
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Sahanous Mallick(Chakdaha College); Uday Chand De(University of Calcutta)"
] |
The object of the present paper is to study N(k)-quasi-Einstein manifolds.
We study an N(k)-quasi-Einstein manifold satisfying the curvature conditions $R(\xi ,X)\cdot \mathcal{Z}=0$,$\mathcal{Z}(X,\xi )\cdot R=0$, and $P(\xi ,X)\cdot \mathcal{Z}=0$, where $R$, $P$ and $\mathcal{Z}$ denote the Riemannian curvature tensor,the projective curvature tensor and $\mathcal{Z}$ tensor respectively. Next we prove that the curvature condition$C\cdot \mathcal{Z}=0$ holds in an N(k)-quasi-Einstein manifold, where $C$ is the conformal curvature tensor.
We also study $\mathcal{Z}$-recurrent N(k)-quasi-Einstein manifolds. Finally, we construct an example of an N(k)-quasi-Einsteinmanifold and mention some physical examples.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002153150
|
oai_dc
|
Characterizations for Real Hypersurfaces in Complex and Quaternionic Space Forms Related to the Normal Jacobi Operator
|
Characterizations for Real Hypersurfaces in Complex and Quaternionic Space Forms Related to the Normal Jacobi Operator
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"정임순(경북대학교); 김규종(경북대학교); 김경남(Kyungpook National University)"
] |
In this paper we give some non-existence theorems for parallel normal Jacobi operator of real hypersurfaces in real, complex and quaternionic space forms, respectively.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002153151
|
oai_dc
|
A New Kind of Slant Helix in Lorentzian (n + 2)−Spaces
|
A New Kind of Slant Helix in Lorentzian (n + 2)−Spaces
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Fatma Ates(Ankara University); Ismail Gok(Ankara University); Faik Nejat Ekmekci(Ankara University)"
] |
In this paper, we introduce a new kindof slant helix for null curves called null $W_{n}-$slant helix and we give adefinition of new harmonic curvature functions of a null curve in terms of $%W_{n}$ in $(n+2)-$dimensional Lorentzian space $M_{1}^{n+2}$ (for $n>3$).
Also, we obtain a characterization such as:\begin{equation*}\text{\textquotedblleft The curve }\alpha \ \text{is a null }W_{n}-\text{%slant helix }\Leftrightarrow H_{n}^{^{\prime }}-k_{1}H_{n-1}-k_{2}H_{n-3}=0"\end{equation*}%where $H_{n},H_{n-1}$ and $H_{n-3}$ are harmonic curvature functions and $%k_{1},k_{2}$ are the Cartan curvature functions of the null curve $\alpha $.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002153152
|
oai_dc
|
Colourings and the Alexander Polynomial
|
Colourings and the Alexander Polynomial
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Roger Picken(Instituto Superior Tecnico, Universidade de Lisboa); Luis Camacho(Universidade da Madeira); Francisco Miguel Dionisio(Universidade de Lisboa)"
] |
Using a combination of calculational and theoretical approaches, we establish results that relate two knot invariants, the Alexander polynomial, and the number of quandle colourings using any finite linear Alexander quandle. Given such a quandle, specified by two coprime integers $n$ and $m$, the number of colourings of a knot diagram is given by counting the solutions of a matrix equation of the form $AX=0$ mod $n$, where $A$ is the $m$-dependent colouring matrix. We devised an algorithm to reduce $A$ to echelon form, and applied this to the colouring matrices for all prime knots with up to 10 crossings, finding just three distinct reduced types. For two of these types, both upper triangular, we found general formulae for the number of colourings. This enables us to prove that in some cases the number of such quandle colourings cannot distinguish knots with the same Alexander polynomial, whilst in other cases knots with the same Alexander polynomial can be distinguished by colourings with a specific quandle. When two knots have different Alexander polynomials, and their reduced colouring matrices are upper triangular, we find a specific quandle for which we prove that it distinguishes them by colourings.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART002153123
|
oai_dc
|
Reconfiguring k-colourings of Complete Bipartite Graphs
|
Reconfiguring k-colourings of Complete Bipartite Graphs
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Gary MacGillivray(University of Victoria); Kelly Choo(University of Victoria); Marcel Celaya(Georgia Tech, Atlanta, GA, USA); Karen Seyffarth(University of Calgary, Calgary, AB, Canada)"
] |
Let $H$ be a graph, and $k\geq \chi(H)$ an integer.
We say that $H$ has a {\em cyclic Gray code of $k$-colourings} if and only ifit is possible to list all its $k$-colourings in such a way thatconsecutive colourings, including the last and the first, agree on allvertices of $H$ except one.
The Gray code number of $H$ is the least integer $k_0(H)$such that $H$ has a cyclic Gray code of its $k$-colouringsfor all $k\geq k_0(H)$.
For complete bipartite graphs, we prove that$k_0(K_{\ell,r})=3$ when both $\ell$ and $r$ are odd, and$k_0(K_{\ell,r})=4$ otherwise.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART001860090
|
oai_dc
|
Double-framed Soft Filters in CI-algebras
|
Double-framed Soft Filters in CI-algebras
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Abdullah M. Al-roqi(King Abdulaziz University)"
] |
The notion of double-framed soft filters of a CI-algebra isintroduced, and related properties are investigated.
Further characterization of a double-framed soft filter is considered, andconditions for a double-framed soft set to be a double-framed softfilter are provided. Finally a new double-framed soft filter from old one isestablished.
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2014.54.1.143
|
kci_detailed_000036.xml
|
||
ART001860074
|
oai_dc
|
Some Properties of S-metric Spaces and Fixed Point Results
|
Some Properties of S-metric Spaces and Fixed Point Results
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Shaban Sedghi(Islamic Azad University); Ishak Altun(Kirikkale University); Nabi Shobe(Islamic Azad University-Babol Branch); Mohammad Ali Salahshour(Islamic Azad University-Savadkooh Branch)"
] |
In this paper, we introduce S-metric spaces and give their someproperties. Also we present a common fixed point theorem for multivaluedmaps on complete S-metric spaces. The single valued case and anillustrative example are given.
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2014.54.1.113
|
kci_detailed_000036.xml
|
||
ART001860030
|
oai_dc
|
Hilbert-Type Integral Inequalities in the Whole Plane with the Non-homogeneous Kernel
|
Hilbert-Type Integral Inequalities in the Whole Plane with the Non-homogeneous Kernel
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Dongmei Xin(Guangdong Institute of Education)"
] |
We build new Hilbert-typeintegral inequalities in the whole plane with the non-homogeneouskernel involving some parameters and the best constant factors. We also consider their reverse.
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2014.54.1.1
|
kci_detailed_000036.xml
|
||
ART001860079
|
oai_dc
|
Pure Ideals in Ordered Semigroups
|
Pure Ideals in Ordered Semigroups
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Thawhat Changphas(Khon Kaen University); Jatuporn Sanborisoot(Khon Kaen University)"
] |
In this paper the concepts of pure ideals, weakly pure ideals and purely prime ideals in ordered semigroups are introduced. We obtain some characterizations of pure ideals and prove that the set of all pure prime ideals is topologized.
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2014.54.1.123
|
kci_detailed_000036.xml
|
||
ART001860067
|
oai_dc
|
Approximation of Common Fixed Points of Mean Non-expansive Mapping in Banach Spaces
|
Approximation of Common Fixed Points of Mean Non-expansive Mapping in Banach Spaces
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Gu Zhaohui(Guangdong University of Foreign Studies); Li Yongjin(Sun Yat-Sen University)"
] |
Let X be a uniformly convex Banachspace, and S,T be pair of mean non-expansive mappings. Somenecessary and sufficient conditions are given for Ishikawa iterativesequence converge to common fixed points, and we prove that thesequence of Ishikawa iterations associated with S and T converges to the common fixed point of S and T. This generalizesformer results proved by Z. Gu and Y. Li [4].
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2014.54.1.103
|
kci_detailed_000036.xml
|
||
ART001860085
|
oai_dc
|
A New Family of q-analogue of Genocchi Numbers and Polynomials of Higher Order
|
A New Family of q-analogue of Genocchi Numbers and Polynomials of Higher Order
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Serkan araci(niversity of Gaziantep); Mehmet acikgoz(University of Gaziantep); 서종진(부경대학교)"
] |
In the present paper, we introduce thenew generalization of q-Genocchi polynomials and numbers ofhigher order. Also, we give some interesting identities. Finally, byapplying q-Mellin transformation to the generating function for q-Genocchi polynomials of higher order put we define novel q-Hurwitz-Zeta type function which is an interpolation forthis polynomials at negative integers.
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2014.54.1.131
|
kci_detailed_000036.xml
|
||
ART001860034
|
oai_dc
|
Edge-Maximal θ2k+1-Edge Disjoint Free Graphs
|
Edge-Maximal θ2k+1-Edge Disjoint Free Graphs
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Mohammed M. M. Jaradat(Qatar University); Mohammed S. A. Bataineh(Qatar University)"
] |
For two positive integers r and s, g(n;r;θs) denotes to the class of graphs on n vertices containing no r of edgedisjoint θs-graphs and f(n;r;θs) = max{ε(G) : G ∈ g(n;r;θs)}. In this paper, for integers r, k ≥ 2, we determine f(n;r;θ2k+1) and characterize the edgemaximal members in g(n;r;θ2k+1).
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2014.54.1.23
|
kci_detailed_000036.xml
|
||
ART001860035
|
oai_dc
|
Integrability and L₁-convergence of Certain Cosine Sums with Quasi Hyper Convex Coefficients
|
Integrability and L₁-convergence of Certain Cosine Sums with Quasi Hyper Convex Coefficients
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Naim Latif Braha(University of Prishtina)"
] |
In this paper criterion for L1-convergence of a certain cosine sums with quasihyper-convex coefficients is obtained.
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2014.54.1.31
|
kci_detailed_000036.xml
|
||
ART001860036
|
oai_dc
|
Fourier Cosine and Sine Transformable Boehmians
|
Fourier Cosine and Sine Transformable Boehmians
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Chinnaraman Ganesan(V. H. N. S. N. College); Rajakumar Roopkumar(Alagappa University)"
] |
The range spaces of Fourier cosine and sine transforms on L1([0,∞)) are characterized. Using Fourier cosine and sine type convolutions, Fourier cosine and sine transformable Boehmian spaces have been constructed, which properly contain L1([0,∞)). The Fourier cosine and sine transforms are extended to these Boehmian spaces consistently and their properties are established.
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2014.54.1.43
|
kci_detailed_000036.xml
|
||
ART001860043
|
oai_dc
|
Weakly Semicommutative Rings and Strongly Regular Rings
|
Weakly Semicommutative Rings and Strongly Regular Rings
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Long Wang(Yangzhou University); Junchao Wei(Yangzhou University)"
] |
A ring R is called weakly semicommutative ring if for any a,b ∈ R* = R ＼{0} with ab=0, there exists n ≥ 1 such that either an ≠ 0 and anRb = 0 or bn ≠ 0 and aRbn = 0. In this paper, many properties of weakly semicommutative rings are introduced, some known results are extended. Especially, we show that a ring R is a strongly regular ring if and only if R is a left SF-ring and weakly semicommutative ring.
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2014.54.1.65
|
kci_detailed_000036.xml
|
||
ART001860053
|
oai_dc
|
Ultra g-Bessel Sequences in Hilbert Spaces
|
Ultra g-Bessel Sequences in Hilbert Spaces
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Mohammad Reza Abdollahpour(University of Mohaghegh Ardabili); Abbas Najati(University of Mohaghegh Ardabili)"
] |
In this paper, we introduce ultra g-Bessel sequences and study some properties of this kind of sequences in Hilbert spaces. We also show that every g-frame for a finite dimensional Hilbert space is an ultra g-Bessel sequence.
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2014.54.1.87
|
kci_detailed_000036.xml
|
||
ART001860061
|
oai_dc
|
The Line n-sigraph of a Symmetric n-sigraph-V
|
The Line n-sigraph of a Symmetric n-sigraph-V
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"P.Siva Kota Reddy(Siddaganga Institute of Technology); K. M. Nagaraja(JSS Academy of Technical Education); M. C. Geetha(East West Institute of Technology)"
] |
An n-tuple (a1, a2, ..., an) is symmetric, if ak = an-k+1, 1 ≤ k ≤ n. Let Hn = {(a1, a2,..., an) : ak ∈ {+,-}, ak = an-k+1, 1 ≤ k ≤ n} be the set ofall symmetric n-tuples. A symmetric n-sigraph (symmetric n-marked graph) is anordered pair Sn = (G, σ) (S_n = (G, μ)), where G=(V,E) is a graph called the underlying graph of Sn and σ : E → Hn ( μ : V → Hn) is a function. The restricted super line graph of index r} of a graph G, denoted by RLr(G). The vertices of RLr(G) are the r-subsets of E(G) and two vertices P = {p1, p2,...,pr} and Q = {q1, q2,...,qr} are adjacent if there exists exactly one pair of edges, say pi and qj, where 1 ≤ i,j ≤ r, that are adjacent edges in G. Analogously, one can define the restricted super line symmetric n-sigraph of index r of a symmetric n-sigraph Sn = (G, σ) as a symmetric n-sigraph RLr(Sn) = (RLr(G), σ'), where RLr(G) is the underlying graph of RLr(Sn), where for any edge PQ in RLr(Sn), σ'(PQ) = σ(P)σ(Q). It is shown that for any symmetric n-sigraph Sn, its RLr(Sn) is i-balanced and we offer a structural characterization of super line symmetric n-sigraphs of index r. Further, we characterize symmetric n-sigraphs Sn for which RLr(Sn) ~ Lr(Sn) and RLr(Sn) =~ Lr(Sn), where ~ and=~ denotes switching equivalence and isomorphism and RLr(Sn) and Lr(Sn) are denotes therestricted super line symmetric n-sigraph of index r and super linesymmetric n-sigraph of index r of Sn respectively.
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2014.54.95
|
kci_detailed_000036.xml
|
||
ART001860032
|
oai_dc
|
Sequence Spaces of Fuzzy Real Numbers Using Fuzzy Metric
|
Sequence Spaces of Fuzzy Real Numbers Using Fuzzy Metric
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Binod Chandra Tripathy(Institute of Advanced Study in Science and Technology); Stuti Borgohain(Indian Institute of Technology)"
] |
The sequence spaces cF(M), c0F(M) and lF(M) of fuzzy real numbers with fuzzy metric are introduced. Some properties of these sequence spaces like solidness, symmetricity,convergence-free etc. are studied. We obtain some inclusionrelations involving these sequence spaces.
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2014.54.1.11
|
kci_detailed_000036.xml
|
||
ART001860049
|
oai_dc
|
Some Difference Paranormed Sequence Spaces over n-normed Spaces Defined by a Musielak-Orlicz Function
|
Some Difference Paranormed Sequence Spaces over n-normed Spaces Defined by a Musielak-Orlicz Function
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Kuldip Raj(Shri Mata Vaishno Devi University); Sunil K. Sharma(Shri Mata Vaishno Devi University); Amit Gupta(Shri Mata Vaishno Devi University)"
] |
In the present paper we introduce difference paranormed sequencespaces c0(M, △nm, p, u, ||ㆍ,ㆍㆍㆍ,ㆍ||) , c(M, △nm, p, u, ||ㆍ,ㆍㆍㆍ,ㆍ||) and l∞(M, △nm, p, u, ||ㆍ,ㆍㆍㆍ,ㆍ||) defined by a Musielak-Orlicz function M = (Mk) over n-normed spaces. We also study some topological properties and someinclusion relations between these spaces.
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2014.54.1.73
|
kci_detailed_000036.xml
|
||
ART001831057
|
oai_dc
|
On G-invariant Minimal Hypersurfaces with Constant Scalar Curvatures in S5
|
On G-invariant Minimal Hypersurfaces with Constant Scalar Curvatures in S5
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"소재업(전북대학교)"
] |
Let G = O(2)xO(2)xO(2). Then a closed G-invariant minimal hypersurfacewith constant scalar curvature in S5 is a product of spheres, i.e., the square norm of itssecond fundamental form, S = 4.
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2013.53.4.515
|
kci_detailed_000036.xml
|
||
ART001831051
|
oai_dc
|
On the Invariance of Primitive Ideals via ϕ-derivations on Banach Algebras
|
On the Invariance of Primitive Ideals via ϕ-derivations on Banach Algebras
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"정용수(선문대학교)"
] |
The noncommutative Singer-Wermer conjecture states that every derivation on a Banach algebra (possibly noncommutative) leaves primitive ideals of the algebra invariant. This conjecture is still an open question for more than thirty years. In this note, we approach this question via some sufficient conditions for the separating ideal of ϕ-derivations to be nilpotent. Moreover, we show that the spectral boundedness of ϕ-derivations implies that they leave each primitive ideal of Banach algebras invariant.
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2013.53.4.497
|
kci_detailed_000036.xml
|
||
ART001831133
|
oai_dc
|
Extreme Bilinear Forms of L(2d*(1,w)2)
|
Extreme Bilinear Forms of L(2d*(1,w)2)
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"김성권(경북대학교)"
] |
First we present the explicit formula for the norm of a bilinear form on the2-dimensional real predual of the Lorentz sequence space d*(1,w)2. Using this formula,we classify the extreme points of the unit ball of L(2d*(1,w)2).
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2013.53.4.625
|
kci_detailed_000036.xml
|
||
ART001831139
|
oai_dc
|
Approximately Orthogonal Additive Set-valued Mappings
|
Approximately Orthogonal Additive Set-valued Mappings
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Alireza Kamel Mirmostafaee(Ferdowsi University of Mashhad); Mostafa Mahdavi(Ferdowsi University of Mashhad)"
] |
We investigate the stability of orthogonally additive set-valued functionalequation F(x + y) = F(x) + F(y) (x ⊥ y)in Hausdorff topology on closed convex subsets of a Banach space.
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2013.53.4.646
|
kci_detailed_000036.xml
|
||
ART001831055
|
oai_dc
|
Some New Application of Power Increasing Sequences
|
Some New Application of Power Increasing Sequences
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Waad Sulaiman(University of Mosul)"
] |
A general theorem for absolute summability using quasi f-power increasing sequence is obtained. This result generalized and improved the result of Bor and Ozarslan [2].
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2013.53.4.507
|
kci_detailed_000036.xml
|
||
ART001831122
|
oai_dc
|
Majorization Properties for Subclasses of Analytic p-Valent Functions Dened by Convolution
|
Majorization Properties for Subclasses of Analytic p-Valent Functions Dened by Convolution
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Rabha Mohamed El-Ashwah(Damietta University); Mohamed Kamal Aouf(Mansoura University)"
] |
The object of the present paper is to investigate the majorization properties of certain subclasses of analytic p-valent functions dened by convolution.
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2013.53.4.615
|
kci_detailed_000036.xml
|
||
ART001831107
|
oai_dc
|
Monodromy Groups on Knot Surgery 4-manifolds
|
Monodromy Groups on Knot Surgery 4-manifolds
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"윤기헌(성신여자대학교)"
] |
In the article we show that nondieomorphic symplectic 4-manifolds whichadmit marked Lefschetz fibrations can share the same monodromy group. Explicitlywe prove that, for each integer g > 0, every knot surgery 4-manifold in a familyfE(2)K jK is a bered 2-bridge knot of genus g in S3g admits a marked Lefschetz brationstructure which has the same monodromy group.
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2013.53.4.603
|
kci_detailed_000036.xml
|
||
ART001831085
|
oai_dc
|
On Semiprime Rings with Generalized Derivations
|
On Semiprime Rings with Generalized Derivations
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Mohd Rais Khan(Central University); Mohammad Mueenul Hasnain(Central University)"
] |
In this paper, we investigate the commutativity of a semiprime ring R ad-mitting a generalized derivation F with associated derivation D satisfying any one of theproperties: (i) F(x) ◦D(y) = [x, y], (ii) D(x) ◦ F(y) = F[x; y], (iii) D(x) ◦ F(y) = xy, (iv)F(x ◦ y) = [F(x), y] + [D(y), x], and (v) F[x, y] = F(x) ◦ y − D(y) ◦ x for all x, y in someappropriate subsets of R.
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2013.53.4.565
|
kci_detailed_000036.xml
|
||
ART001831081
|
oai_dc
|
Some Identities Involving Euler Polynomials Arising from a Non-linear Differential Equation
|
Some Identities Involving Euler Polynomials Arising from a Non-linear Differential Equation
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"임석훈(경북대학교); 정주희(경북대학교); 박진우(경북대학교); 김태균(광운대학교)"
] |
We derive a family of non-linear differential equations from the generating functions of the Euler polynomials and study the solutions of these differential equations. Then we give some new and interesting identities and formulas for the Euler polynomials of higher order by using our non-linear differential equations.
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2013.53.4.553
|
kci_detailed_000036.xml
|
||
ART001831099
|
oai_dc
|
Ricci Semi-Symmetric Lightlike Hypersurfaces of an Indefinite Cosymplectic Space Form
|
Ricci Semi-Symmetric Lightlike Hypersurfaces of an Indefinite Cosymplectic Space Form
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Ram Shankar Gupta(Guru Gobind Singh Indraprastha University)"
] |
This paper is devoted to study Ricci semi-symmetric lightlike hypersurfaces ofan indefinite cosymplectic space form with structure vector field tangent to hypersurface.
The condition for Ricci tensor of lightlike hypersurface of indefinite cosymplectic spaceform to be semi-symmetric and parallel have been obtained. An example of non-totallygeodesic Ricci semi-symmetric lightlike hypersurface in R72 have been given.
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2013.53.4.593
|
kci_detailed_000036.xml
|
||
ART001831150
|
oai_dc
|
On the Variational Approach for Analyzing the Stability of Solutions of Evolution Equations
|
On the Variational Approach for Analyzing the Stability of Solutions of Evolution Equations
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Hamdy I. Abdel-Gawad(Cairo University); M. S. Osman(Cairo University)"
] |
The eigenvalue problems arise in the analysis of stability of traveling wavesor rest state solutions are currently dealt with, using the Evans function method. In theliterature, it had been shown that, use of this method is not straightforward even in verysimple examples. Here an extended "variational" method to solve the eigenvalue problemfor the higher order dierential equations is suggested. The extended method is matchedto the well known variational iteration method. The criteria for validity of the eigenfunctionsand eigenvalues obtained is presented. Attention is focused to nd eigenvalue andeigenfunction solutions of the Kuramoto-Slivashinsky and (K[p,q]) equation.
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2013.53.4.680
|
kci_detailed_000036.xml
|
||
ART001831144
|
oai_dc
|
On the Dynamical Behavior of a Two-Prey One-Predator System with Two-Type Functional Responses
|
On the Dynamical Behavior of a Two-Prey One-Predator System with Two-Type Functional Responses
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"백헌기(대구가톨릭대학교)"
] |
In the paper, a two-prey one-predator system with defensive ability and Holling type-II functional responses is investigated. First, the stability of equilibrium points of the system is discussed and then conditions for the persistence of the system are established according to the existence of limit cycles. Numerical examples are illustrated to attest to our mathematical results. Finally, via bifurcation diagrams, various dynamic behaviors including chaotic phenomena are demonstrated.
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2013.53.4.647
|
kci_detailed_000036.xml
|
||
ART001831091
|
oai_dc
|
Simple ECEM Algorithms Using Function Values Only
|
Simple ECEM Algorithms Using Function Values Only
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"김필수(경북대학교); 김상동(경북대학교); 이은정(연세대학교)"
] |
In this paper, we improve the error corrected Euler method(ECEM) introduced in [11] by evaluating function values only at local nodes in each time interval. As a result, one can avoid computations of Jacobian matrices on each time interval so that the algorithms become simpler to implement in solving various class of time dependent differential equations numerically. The proposed ECEM formula resembles to the Runge-Kutta method in its representations but both methods have different characteristic properties.
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2013.53.4.573
|
kci_detailed_000036.xml
|
||
ART001831079
|
oai_dc
|
Zeros and Uniqueness of Difference Polynomials of Meromorphic Functions
|
Zeros and Uniqueness of Difference Polynomials of Meromorphic Functions
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Xiaoguang Qi(University of Jinan); Jia Dou(Quancheng Middle School)"
] |
This research is a continuation of a recent paper due to the first author in [9].
Different from previous results, we investigate the value distribution of difference polynomialsof moromorphic functions in this paper. In particular, we are interested in theexistence of zeros of f(z)n(λf(z +c)m +μf(z)m)-a, where f is a moromorphic function,n, m are two non-negative integers, and λ, μ are non-zero complex numbers. However, theproof here is obviously different to the one in [9]. We also study difference polynomials ofentire functions sharing a common value, which improves the result in [10, 13].
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2013.53.4.541
|
kci_detailed_000036.xml
|
||
ART001776019
|
oai_dc
|
Sets of Integer Matrix Pairs Derived from Row Rank Inequalities and Their Preservers
|
Sets of Integer Matrix Pairs Derived from Row Rank Inequalities and Their Preservers
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"송석준(제주대학교); 전영배(경상대학교)"
] |
In this paper, we consider the row rank inequalities derived from comparisons of the row ranks of the additions and multiplications of nonnegative integer matrices and construct the sets of nonnegative integer matrix pairs which is occurred at the extreme cases for the row rank inequalities. We characterize the linear operators that preserve these extreme sets of nonnegative integer matrix pairs.
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2013.53.2.273
|
kci_detailed_000036.xml
|
||
ART001776000
|
oai_dc
|
On BN-algebras
|
On BN-algebras
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"김창범(국민대학교); 김희식(한양대학교)"
] |
In this paper, we introduce a BN-algebra, and we prove that a BN-algebra is 0-commutative, and an algebra X is a BN-algebra if and only if it is a 0-commutative BF-algebra. And we introduce a quotient BN-algebra, and we investigate some relations between BN-algebras and several algebras.
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2013.53.2.175
|
kci_detailed_000036.xml
|
||
ART001776037
|
oai_dc
|
The Unit Ball of Ls(2d*(1,w)2)
|
The Unit Ball of Ls(2d*(1,w)2)
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"김성권(경북대학교)"
] |
First we present the explicit formula for the norm of a symmetric bilinearform on the 2-dimensional real predual of the Lorentz sequence space d*(1,w)2. Usingthis formula, we classify the extreme points of the unit ball of Ls(2d*(1,w)2)
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2013.53.2.295
|
kci_detailed_000036.xml
|
||
ART001776012
|
oai_dc
|
A Fixed Point Approach to the Stability of a Generalized Quadratic and Additive Functional Equation
|
A Fixed Point Approach to the Stability of a Generalized Quadratic and Additive Functional Equation
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"진선숙(공주교육대학교); 이양희(공주교육대학교)"
] |
In this paper, we investigate the stability of the functional equation f(x + 2y) - 2f(x + y) + 2f(x - y) - f(x - 2y) = 0 by using the xed point theory in the sense of L. Cadariu and V. Radu.
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2013.53.2.219
|
kci_detailed_000036.xml
|
||
ART001776017
|
oai_dc
|
Multiple Unbounded Positive Solutions for the Boundary Value Problems of the Singular Fractional Differential Equations
|
Multiple Unbounded Positive Solutions for the Boundary Value Problems of the Singular Fractional Differential Equations
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Yuji Liu(Hunan Institute of Science and Technology); Haiping Shi(Guangdong Construction Vocational Technology Instiute); Xingyuan Liu(Shaoyang University)"
] |
In this article, we establish the existence of at least three unbounded positive solutions to a boundary-value problem of the nonlinear singular fractional differential equation. Our analysis relies on the well known fixed point theorems in the cones
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2013.53.2.257
|
kci_detailed_000036.xml
|
||
ART001776005
|
oai_dc
|
Meromorphic Functions Sharing a Nonzero Polynomial IM
|
Meromorphic Functions Sharing a Nonzero Polynomial IM
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Pulak Sahoo(University of Kalyani)"
] |
We study the uniqueness of meromorphic functions concerning nonlinear differential polynomials sharing a nonzero polynomial IM. Though the main concern of the paper is to improve a recent result of the present author [12], as a consequence of the main result we also generalize two recent results of X. M. Li and L. Gao [11].
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2013.53.2.191
|
kci_detailed_000036.xml
|
||
ART001776009
|
oai_dc
|
Integrability of Distributions in GCR-lightlike Submanifolds of Inde nite Sasakian Manifolds
|
Integrability of Distributions in GCR-lightlike Submanifolds of Inde nite Sasakian Manifolds
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Varun Jain(Multani Mal Modi College); Rakesh Kumar Nagaich(Punjabi University); Rakesh Kumar(University College of Engineering)"
] |
In this paper, we study GCR-lightlike submanifolds of indefinite Sasakianmanifold. We give some necessary and sufficient conditions on integrability of various distributionsof GCR-lightlike submanifold of an indefinite Sasakian manifold. We also findthe conditions for each leaf of holomorphic distribution and radical distribution is totallygeodesic.
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2013.53.2.207
|
kci_detailed_000036.xml
|
||
ART001776036
|
oai_dc
|
On Φ-pseudo Symmetries of (LCS)n-Manifolds
|
On Φ-pseudo Symmetries of (LCS)n-Manifolds
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Shyamal Kumar Hui(Nikhil Banga Sikshan Mahavidyalaya)"
] |
The present paper deals with a study of φ-pseudo symmetric and φ-pseudoRicci symmetric (LCS)n-manifolds. It is shown that every φ-pseudo symmetric (LCS)n-manifold and φ-pseudo Ricci symmetric (LCS)n-manifold are η-Einstein manifold.
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2013.53.2.285
|
kci_detailed_000036.xml
|
||
ART001775997
|
oai_dc
|
Some Siegel Threefolds with a Calabi-Yau Model II
|
Some Siegel Threefolds with a Calabi-Yau Model II
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Eberhard Freitag(University of Heidelberg); Riccardo Salvati Manni(University La Sapienza)"
] |
In a previous paper, we described some Siegel modular threefolds which admita Calabi-Yau model. Using a different method we give in this paper an enlarged listof such varieties. Basic for this method is a paper of van Geemen and Nygaard. Theystudy a variety X that is the complete intersection of four quadrics in P7(C). This isbiholomorphic equivalent to the Satake compactification of H2/Γ′ for a certain subgroup Γ′ ⊂ Sp(2, Z) and it will be the starting point of our investigation. It has been pointedout that a (projective) small resolution of this variety is a rigid Calabi-Yau manifold ˜X.
Then we will consider the action of quotients of modular groups on X and study possibleresolutions that admits a Calabi-Yau model in the category of complex spaces.
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2013.53.2.149
|
kci_detailed_000036.xml
|
||
ART001776015
|
oai_dc
|
The Spectrum of the Opertator D(r, 0, 0, s) over the Sequence Spaces c0 and c
|
The Spectrum of the Opertator D(r, 0, 0, s) over the Sequence Spaces c0 and c
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Binod Chandra Tripathy(Institute of Advanced Study in Science and Technology); Avinoy Paul(Cachar College)"
] |
In this paper we have examined the spectra of the operator D(r, 0, 0, s) onsequence spaces c0 and c.
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2013.53.2.247
|
kci_detailed_000036.xml
|
||
ART001776002
|
oai_dc
|
A Class of Invertible Bilateral Weighted Shifts
|
A Class of Invertible Bilateral Weighted Shifts
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"정일봉(경북대학교); 칼피어시(Texas A & M Univ.)"
] |
In this note we study a class of invertible weighted bilateral shifts on Hilbert space introduced by Haskell Rosenthal recently. We show that every Rosenthal shift is unitarily equivalent to its inverse, not quasisimilar to its adjoint, and has a nontrivial hyperinvariant subspace.
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2013.53.2.185
|
kci_detailed_000036.xml
|
||
ART001776013
|
oai_dc
|
Ulam Stability Generalizations of 4th- Order Ternary Deriva- tions Associated to a Jmrassias Quartic Functional Equation on Frechet Algebras
|
Ulam Stability Generalizations of 4th- Order Ternary Deriva- tions Associated to a Jmrassias Quartic Functional Equation on Frechet Algebras
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Ali Ebadian(Payame Noor University)"
] |
Let A be a Banach ternary algebra over a scalar eld R or C and X be aternary Banach A-module. A quartic mapping D : (A, [ ]A) ! (X, [ ]X) is called a 4th-order ternary derivation if D([x, y, z]) = [D(x), y4, z4] + [x4,D(y), z4] + [x4, y4,D(z)] forall x, y, z 2 A. In this paper, we prove Ulam stability generalizations of 4th- order ternaryderivations associated to the following JMRassias quartic functional equation on frechetalgebras:f(kx + y) + f(kx - y) = k2[f(x + y) + f(x - y)]+ 2k2(k2 - 1)f(x) - 2(k2 - 1)f(y).
|
수학
| null |
http://dx.doi.org/10.5666/KMJ.2013.53.2.233
|
kci_detailed_000036.xml
|
||
ART001188979
|
oai_dc
|
Strong Reducedness and Strong Regularity for Near-rings
|
Strong Reducedness and Strong Regularity for Near-rings
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Yong Uk Cho(Silla University); Yasuyuki Hirano(Okayama University)"
] |
A near-ring N is called strongly reduced if, for a 2 N , a2 2 Nc implies a 2 Nc, where Nc denotes the constant part of N . We investigate some properties of strongly reduced near-rings and apply those to the study of left strongly regular near-rings. Finally we classify all reduced, and strongly reduced near-rings of order 7:
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART000917218
|
oai_dc
|
On the Sum of Two Radical Classes
|
On the Sum of Two Radical Classes
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"M.Zulfiqar(Government College); M. Aslam(Government College)"
] |
Let } 1; }2 be the radical classes of rings. Y. Lee and R. E. Propes have defined their sum by } 1 + } 2 = fR 2 ! :} 1(R) + } 2(R) = Rg: They have shown that} 1 + } 2 is not a radical class in general. In this paper, a few results of Lee and Propesare generalized and also new conditions are investigated under which this sum becomes a radical class.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART000917222
|
oai_dc
|
Strongly Unique Best Coapproximation
|
Strongly Unique Best Coapproximation
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Geetha S. Rao(University of Madras); R.Saravanan(Deemed University)"
] |
This paper delineates some fundamental properties of the set of strongly unique best coapproximation. Uniqueness of strongly unique best coapproximation is studied. Some characterizations of strongly unique best coapproximation and strongly unique best approximation are obtained. Some more results concerning strongly unique best uniform coapproximation and strongly unique best uniform approximation are presented. Some relations between best uniform approximation and strongly unique best uniform coapproximation are established.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART000917223
|
oai_dc
|
Remarks on the Valid Equations in Lattice Implication Algebras
|
Remarks on the Valid Equations in Lattice Implication Algebras
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"JooheeJeong(Kyungpook University)"
] |
We present a set of equations that axiomatizes the class of all lattice implication algebras. The construction is different from the one given in [7], and the proof is direct: i.e., it does not rely on results from outside the realm of the lattice implication algebras, such as the theory of BCK-algebras. Then we show that the lattice H implication algebras are nothing more than the familiar Boolean algebras. Finally we obtain some negative results for the embedding of lattice implication algebras into Boolean algebras.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART000917219
|
oai_dc
|
A Commutativity Theorem for Rings
|
A Commutativity Theorem for Rings
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"M.S.S.Khan(University of Missouri-St. Louis)"
] |
The aim of the present paper is to establish for commutativity of rings with unity 1 satisfying one of the properties (xy)k+1 = xkyk+1 x and (xy)k+1 = yxk+1 yk;forall x;y in R; and the mapping x ! xk is an ti-homomorphism where k 1 is a fixed positive integer.
|
수학
| null |
kci_detailed_000036.xml
|
|||
ART001188980
|
oai_dc
|
Rate of Convergence of the Integral Type Lupas-Bezier Operators
|
Rate of Convergence of the Integral Type Lupas-Bezier Operators
|
{
"journal_name": "경북대학교 자연과학대학 수학과",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Xiao-Ming Zeng(Xiamen University); WangTao(Xiamen University)"
] |
In this paper we introduce the integral type Lupas-Bezier operator ~Bn; , which is a new approximation operator of probabilistic type. We study the rate of pointwise convergence of the operators ~Bn; for local bounded functions and get an asymptotically estimate by means of some methods and techniques of probability theory.
|
수학
| null |
kci_detailed_000036.xml
|
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