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ART000917082
oai_dc
Interpolation Problems for Trace-Class Operator in Tridiagonal Algebra
Interpolation Problems for Trace-Class Operator in Tridiagonal Algebra
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "JOO HO KANG(Taegu University); YOUNG SOO JO(Keimyung University)" ]
Given operators X and Y in a Hilbert space, an interpolating operator is a bounded operator T such that TX=Y. In this article, we obtained the following: Let X=(x_i,j) and Y=(y_i,j) be operators in B(H) such that s_iσ(i) 0 for all i where σ:N->N is a mapping. Then the following statements are equivalent. (1) There exis...
수학
null
kci_detailed_000040.xml
ART000973380
oai_dc
Idempotent Separating Congruences in a Weak P-regular Semigroup
Idempotent Separating Congruences in a Weak P-regular Semigroup
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "M. K. SEN(University of Calcutta); A. SETH(Bangabasi College)" ]
Yamada and Sen introduced the concept of P-regularity[1] in a regular semigroup as a generalization of both the concept of "orthgodox" and the concept of "(special) involution". In [2] Sen and Chattopadhyay defined p-regular semigroup by weakening the defining conditions of P-regular semigroup. In this paper we call th...
수학
null
kci_detailed_000040.xml
ART000917045
oai_dc
The Depth of a Weak Hypersubstitution
The Depth of a Weak Hypersubstitution
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "S. LEERATANAVALEE(ChiangMai University)" ]
In this paper the concept of the depth of a hypersubstitution, which was introduced by K. Denecke, J. Koppitz and Sl.Shtrakov, will be generalized to the depth of a weak hypersubstitution. Our goal is to describe the behavior of the depth under some mappings defined on sets of polynomials such as weak hypersubstitution...
수학
null
kci_detailed_000040.xml
ART000917047
oai_dc
Estimates of Hyperbolic Metric with Applications to Teichmuller Spaces
Estimates of Hyperbolic Metric with Applications to Teichmuller Spaces
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "TOSHIYUKI SUGAWA(Kyoto University)" ]
We show a monotonicity property of the hyperbolic metric of a punctured rectangular torus. We will then deduce a lower estimate of the hyperbolic metric of the domain C\{0,1}. We also determine the value of hyperbolic sup-norm of standard quadratic differentials on the once-punctured square torus or the symmetric four-...
수학
null
kci_detailed_000040.xml
ART000917046
oai_dc
Fuzzy Ideals Extensions in Semigroups
Fuzzy Ideals Extensions in Semigroups
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "XIANG YUN XIE(Wuyi University)" ]
In this paper, we shall introduce the notions of fuzzy ideal extension property, strongly fuzzy extension property and fuzzy property of a semigroup S. We also discuss the relations of these fuzzy ideal extension poperties and some properties of semigroups with the fuzzy ideal extension prorerty. Furthermore, we prove ...
수학
null
kci_detailed_000040.xml
ART000917083
oai_dc
On Certain Subclasses of Meromorphically Univalent Funtions
On Certain Subclasses of Meromorphically Univalent Funtions
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "J. PATEL(Utkal University); POULASTI SAHOO(Sonepur College)" ]
By using the techniques involving Briot-Bouquet differential subordination, we study various properties and characteristics of the subclass of meromorphic functions in the annulus . The results, obtained here, include inclusion relations, coefficient estimates and some convolution properties for functions belong to the...
수학
null
kci_detailed_000040.xml
ART000973724
oai_dc
Locally Sierpinski Spaces as Interval Quotients
Locally Sierpinski Spaces as Interval Quotients
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "F. J. CRAVEIRO de CARVALHO(Universidade de Coimbra); BERND WEGNER(TU Berlin)" ]
In [2] it was shown that every connected, finite, locally Sierpinski space can be obtained as a quotient ,where G is a group of homeomorphisms. This result was established with basis on a result which does not extend to R. The purpose of this note is to show that the only locally Sierpinski spaces which occur as quotie...
수학
null
kci_detailed_000040.xml
ART000917043
oai_dc
Incomparability and Transitivity
Incomparability and Transitivity
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "J. NEGGERS(University of Alabama); YOUNG HEE KIM(Chungbuk National University); HEE SIK KIM(Hanyang University)" ]
In this paper we discuss a dimension (parallel dimension) of pogroupoids associated with posets and relate it to their pogroupoid algebras. This dimension is also an invariant of the incomparability graph (Harris diagram) of the poset under graph isomorphism (incomparability preserving bijection or bijective Harris map...
수학
null
kci_detailed_000040.xml
ART001185136
oai_dc
On a Linear Combination of Classes of Multivalently Harmonic Functions
On a Linear Combination of Classes of Multivalently Harmonic Functions
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "OM P. AHUJA(Kent State University); JAY M. JAHANGIRI(Kent State University)" ]
New classes of multivalent harmonic functions are introduced. We give sufficient coefficient conditions for these classes. These coefficient conditions are shown to be also necessary if certain restrictions are imposed on the coefficients of these harmonic functions. Furthermore, we determine a representation theorem, ...
수학
null
kci_detailed_000040.xml
ART000917044
oai_dc
Semilattices with an Involution
Semilattices with an Involution
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "IVAN CHAJDA(Palacky University)" ]
Semilattice with a unary operation are treated. We set a simple condition such that every semilattice with a unary operation satisfying it is a lattice. If one more simple condition is satisfied, this lattice is an ortholattice where the unary operation is a ortho-complementation.
수학
null
kci_detailed_000040.xml
ART000917048
oai_dc
Hyers-Ulam-Rassias Stability of a Quadratic Functional Equation
Hyers-Ulam-Rassias Stability of a Quadratic Functional Equation
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "ICK-SOON CHANG(Chungnam National University); HARK-MAHN KIM(Chungnam National University)" ]
In this paper, the Hyers-Ulam-Rassias stability of the equation f(x+y+z)+f(x)+f(y)+f(z)=f(x+y)+f(y+z)+f(z+x) shall be proved under the approximately even (or odd) condition by using the ideas from the papers of Rassias[12] and Hyers[5].
수학
null
kci_detailed_000040.xml
ART000917085
oai_dc
κ-Compact Frames
κ-Compact Frames
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "NIZAR MARCUS(University of the Western Cape)" ]
A pointfree version of Herrlich's κ-compact spaces is presented. We show that the classes of κ-LIndeloef frames are generated by the open-set lattices of spaces introduced by Husek to show that the categories of κ-compact spaces are all simple in the category of Hausdorff spaces. A pointfree analogue of Hong's zero dim...
수학
null
kci_detailed_000040.xml
ART000917086
oai_dc
A Note on almost s-continuous Functions
A Note on almost s-continuous Functions
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "SEONG HOON CHO(Hanseo University)" ]
This paper gives some characterizations of almost s-continuous functions.
수학
null
kci_detailed_000040.xml
ART000917049
oai_dc
Some Results for Unified Riemann-Zeta Function
Some Results for Unified Riemann-Zeta Function
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "S. P. GOYAL(University of Rajasthan); A. PARASHAR(University of Rajasthan)" ]
In this paper we first establish N-fractional calculus of unified Riemann-zeta function and discuss its convergence. Several identities for this function are given. The results obtained recently by K. Nishimoto follow as special cases of our results.
수학
null
kci_detailed_000040.xml
ART000973723
oai_dc
On a Connection on Contact and Hypercontact Manifolds
On a Connection on Contact and Hypercontact Manifolds
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "H. KITAHARA(Kanazawa University); JIN SUK PAK(Kyungpook University)" ]
In this paper we investigate some geometric properties of the product connection due to I. Vaisman for a contact structure and hypercontact structure from the viewpoint of Riemannian foliation and rewrite some results about those structures in 1970's by using this connection.
수학
null
kci_detailed_000040.xml
ART000972711
oai_dc
Convergence of the C^{1} Lagrange Polynomial Spline Interpolation
Convergence of the C^{1} Lagrange Polynomial Spline Interpolation
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "SANG DONG KIM(Kyungpook National University); SANG HUN LEE(Kyungpook National University); BYEONG CHUN SHIN(서울대학교)" ]
For a smooth function defined in the unit interval, a convergence analysis of its C^{1} Lagrange polynomial spline interpolation is provided with some numerical evidences. The C^{1} Lagrange polynomial splines employed in this paper is defined with Legendre-Gauss points in uniform subintervals of [0,1].
수학
null
kci_detailed_000040.xml
ART000973379
oai_dc
On Partially Unit-regularity
On Partially Unit-regularity
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "HUANYIN CHEN(Hunan Normal University)" ]
In this paper, we investigate partially unit-regularity. We show that R is partially unit-regular if and only if whenever ab and ba are strongly π-regular, there exists a u U(R) such that (ab)d=u(ba)d u -1. Furthermore, we show that if T is the ring of a Morita context(A,B,M,N,ψ,φ) with zero pairings, then T is partial...
수학
null
kci_detailed_000040.xml
ART000917087
oai_dc
On LP-Sasakian Manifolds with a Coefficient α
On LP-Sasakian Manifolds with a Coefficient α
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "U. D. DE(University of Kalyani); A. A. SHAIKH(University of Kalyani); A. SENGUPTA(University of Kalyani)" ]
수학
null
kci_detailed_000040.xml
ART001278226
oai_dc
MV -Algebras of Continuous Functions and l-Monoids
MV -Algebras of Continuous Functions and l-Monoids
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Myeong Og Kim(Kyungpook National University); Tae Ho Choe(McMaster University, Canada); Eun Sup Kim(경북대학교); Young Soo Park(경북대학교)" ]
A. Di Nola & S.Sessa [8] showed that two compact spaces X and Y are homeomorphic iff the MV -algebras C(X, I) and C(Y, I) of continuous functions defined on X and Y respectively are isomorphic. And they proved that A is a semisimple MV -algebra iff A is a subalgebra of C(X) for some compact Hausdorff space X. In this p...
수학
null
kci_detailed_000040.xml
ART001277957
oai_dc
Enumeration of Algebraic Tangles with Applications to Theta- curves and Handcuff Graphs
Enumeration of Algebraic Tangles with Applications to Theta- curves and Handcuff Graphs
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Hiromasa Moriuchi(Osaka City University)" ]
We enumerate all algebraic tangles of seven crossings or less up to equivalence. These tangles are mutually distinguished by the corresponding links and their double. The result will be used for enumerating θ-curves and handcuff graphs in a forthcoming paper.
수학
null
kci_detailed_000040.xml
ART001278225
oai_dc
On Observability of Fuzzy Dynamical Matrix Lyapunov Systems
On Observability of Fuzzy Dynamical Matrix Lyapunov Systems
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Madhunapantula Suryanarayana Murty(Acharya Nagarjuna University-Nuzvid Camp); Murty and Grande Suresh Kumar(Acharya Nagarjuna University-Nuzvid Camp)" ]
In this paper we generate a fuzzy dynamical matrix Lyapunov system and obtain a sufficient condition for the observability of this system.
수학
null
kci_detailed_000040.xml
ART001278210
oai_dc
Some Fixed Point Theorems for Multivalued Maps Satisfying an Implicit Relation on Metrically Convex Spaces
Some Fixed Point Theorems for Multivalued Maps Satisfying an Implicit Relation on Metrically Convex Spaces
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Ishak Altun(Kirkkale University); Duran Turkoglu(Gazi University)" ]
In this paper, we give some fixed point theorems for multivalued maps satisfying an implicit relation on metrically convex spaces. Our results extend and generalize some fixed point theorem in the literature.
수학
null
kci_detailed_000040.xml
ART001278221
oai_dc
Real Hypersurfaces in Complex Hyperbolic Space with Commuting Ricci Tensor
Real Hypersurfaces in Complex Hyperbolic Space with Commuting Ricci Tensor
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Young Jin Suh(Kyungpook National University (Korea)); U-Hang Ki(The National Academy of Sciences,)" ]
In this paper we consider a real hypersurface M in complex hyperbolic space HnC satisfying SΦA = AΦS, where , A and S denote the structure tensor, the shape operator and the Ricci tensor of M respectively. Moreover, we give a characterization of real hypersurfaces of type A in HnC by such a commuting Ricci tensor.
수학
null
kci_detailed_000040.xml
ART001278227
oai_dc
Residual P-Finiteness of Certain Generalized Free Products of Nilpotent Groups
Residual P-Finiteness of Certain Generalized Free Products of Nilpotent Groups
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "김관수(영남대학교); Youngmi Lee(Yeungnam University); James McCarron(Waterloo Maple, Inc. Waterloo)" ]
We show that free products of finitely generated and residually p-finite nilpotent groups, amalgamating p-closed central subgroups are residually p-finite. As a consequence, we are able to show that generalized free products of residually p-finite abelian groups are residually p-finite if the amalgamated subgroup is cl...
수학
null
kci_detailed_000040.xml
ART001278222
oai_dc
Weak Normality and Strong t-closedness of Generalized Power Series Rings
Weak Normality and Strong t-closedness of Generalized Power Series Rings
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Hwankoo Kim(Hoseo University (Korea)); Eun Ok Kwon(Changwon National University); Tae In Kwon(Changwon NationalUniversity (Korea))" ]
For an extension A ⊆ B of commutative rings, we present a sufficient condition for the ring [[A^{S}, ^{≤}]] of generalized power series to be weakly normal (resp., strongly t-closed) in [[B^{S}, {≤}]], where (S, ≤) be a torsion-free cancellative strictly ordered monoid. As a corollary, it can be applied to the ring of ...
수학
null
kci_detailed_000040.xml
ART001278229
oai_dc
Stability for a Holling Type IV Food Chain System With Impulsive Perturbations
Stability for a Holling Type IV Food Chain System With Impulsive Perturbations
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Hunki Baek(Kyungpook National University); Younghae Do(Kyungpook National University)" ]
We investigate a three species food chain system with a Holling type IV functional response and impulsive perturbations. We find conditions for local and global stabilities of prey(or predator) free periodic solutions by applying the Floquet theory and the comparison theorems.
수학
null
kci_detailed_000040.xml
ART001278220
oai_dc
Some Further Results on Weighted Sharing of Values for Meromorphic Functions Concerning a Result of Terglane
Some Further Results on Weighted Sharing of Values for Meromorphic Functions Concerning a Result of Terglane
{ "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))" ]
In this paper, we deal with the problem of meromorphic functions that have three weighted sharing values, and obtain some uniqueness theorems which improve those given by N. Terglane, Hong-Xun Yi & Xiao-Min Li, and others. Some examples are provided to show that the results in this paper are best possible.
수학
null
kci_detailed_000040.xml
ART001278206
oai_dc
On Generalized Integral Operator Based on Salagean Operator
On Generalized Integral Operator Based on Salagean Operator
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Huda Abdullah Al-Kharsani(Faculty of Science, Girls College,Saudi )" ]
Let A(p) be the class of function f: z^{p} + sum^{infty }_{j=1} a_{j} z^{p+j} analytic in the open unit disc E. Let, for any integer n > -p, f_{n+p-1} (z) = z^{p} + sum^{infty}_{j=1} (p+j)^{n+p-1} z^{p+j}. We define f^{(-1)}_{n+p-1}(z) by using convolution as f_{n+p-1} * f^{-1}_{n+p-1} = {z^{p}/{(1-z)^{n+p}}. A functio...
수학
null
kci_detailed_000040.xml
ART001278224
oai_dc
Linear Preservers of Perimeters of Nonnegative Real Matrices
Linear Preservers of Perimeters of Nonnegative Real Matrices
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Seok-Zun Song(Cheju National University, Korea); 강경태(Cheju National University)" ]
For a nonnegative real matrix A of rank 1, A can be factored as ab^t for some vectors a and b. The perimeter of A is the number of nonzero entries in both a and b. If B is a matrix of rank k, then B is the sum of k matrices of rank 1. The perimeter of B is the minimum of the sums of perimeters of k matrices of rank 1, ...
수학
null
kci_detailed_000040.xml
ART001278228
oai_dc
Permanence of a Three-species Food Chain System with Impulsive Perturbations
Permanence of a Three-species Food Chain System with Impulsive Perturbations
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Hunki Baek(Kyungpook National University); Hung Hwan Lee(Kyungpook National University)" ]
We investigate a three-species food chain system with Lotka-Volterra func- tional response and impulsive perturbations. In [23], Zhang and Chen have studied the system. They have given conditions for extinction of lowest-level prey and top predator and considered the local stability of lower-level prey and top predator...
수학
null
kci_detailed_000040.xml
ART001278218
oai_dc
A Chemotherapy-Diffusion Model for the Cancer Treatment and Initial Dose Control
A Chemotherapy-Diffusion Model for the Cancer Treatment and Initial Dose Control
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Hamdy Ibrahim Abdel-Gawad(Cairo University); Khaled Mmohamed Saad(Taiz University)" ]
A one site chemotherapy agent-diffusion model is proposed which accounts for diffusion of chemotherapy agent, normal and cancer cells. It is shown that, by controlling the initial conditions, consequently an initial dose of the chemotherapy agent, the system is guaranteed to evolute towards a target equilibrium state. ...
수학
null
kci_detailed_000040.xml
ART001278219
oai_dc
On Distribution of Order Statistics from Kumaraswamy Distribution
On Distribution of Order Statistics from Kumaraswamy Distribution
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Mridula Garg(University of Rajasthan (India))" ]
In the present paper we derive the distribution of single order statistics, joint distribution of two order statistics and the distribution of product and quotient of two order statistics when the independent random variables are from continuous Kumaraswamy distribution. In particular the distribution of product and qu...
수학
null
kci_detailed_000040.xml
ART001278212
oai_dc
Some properties of a Certain family of Meromorphically Univalent Functions defined by an Integral Operator
Some properties of a Certain family of Meromorphically Univalent Functions defined by an Integral Operator
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Rasoul Aghalary(University of Urimia)" ]
Making use of a linear operator, we introduce certain subclass of meromorphically univalent functions in the punctured unit disk and study its properties including some inclusion results, coefficient and distortion problems. Our result generalize many results known in the literature.
수학
null
kci_detailed_000040.xml
ART001278223
oai_dc
On Certain Extension of Hilbert’s Integral Inequality with Best Constants
On Certain Extension of Hilbert’s Integral Inequality with Best Constants
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Yongjin Li(Sun Yat-sen University, ); Yu Lin(Sun Yat-Sen University); Bing He(Guangdong Education College)" ]
In this paper, by introducing a new function with two parameters, we give another generalizations of the Hilbert’s integral inequality with a mixed kernel k(x, y) = 1/A(x+y)+B|x−y| and a best constant factors. As applications, some particular results with the best constant factors are considered.
수학
null
kci_detailed_000040.xml
ART001278215
oai_dc
Norm and Numerical Radius of 2-homogeneous Polynomials on the Real Space l^{2}_{p}, (1 < p < infinite)
Norm and Numerical Radius of 2-homogeneous Polynomials on the Real Space l^{2}_{p}, (1 < p < infinite)
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Sung Guen Kim(Kyungpook National University)" ]
In this note, we present some inequalities for the norm and numerical radius of 2-homogeneous polynomials from the 2-dimensional real space l^{2}_{p}, (1 < p < infinite) to itself in terms of their coefficients. We also give an upper bound for n^(k)(l^{2}_{p}) ), (k = 2, 3, · · · ).
수학
null
kci_detailed_000040.xml
ART001240998
oai_dc
Modules Which Are Lifting Relative To Module Classes
Modules Which Are Lifting Relative To Module Classes
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Muhammet Tamer Kosan(Gebze Institute of Technology); Abdullah Harmanci(Hacettepe University)" ]
In this paper, we study a module which is lifting and supplemented relative to a module class. Let R be a ring, and let X be a class of R-modules. We will define X-lifting modules and X-supplemented modules. Several properties of these modules are proved. We also obtain results for the case of specific classes of modul...
수학
null
kci_detailed_000040.xml
ART001240999
oai_dc
WT-Classes of Differential Forms on Riemannian Manifolds
WT-Classes of Differential Forms on Riemannian Manifolds
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Gao Hongya(Hebei University); Gu Zhihua(Hebei University); Chu Yuming(Huzhou Teachers College)" ]
The purpose of this paper is to study the relations between quasilinear elliptic equations on Riemannian manifolds and differential forms. Two classes of differential forms are introduced and it is shown that some differential expressions are connected in a natural way to quasilinear elliptic equations.
수학
null
kci_detailed_000040.xml
ART001241000
oai_dc
On the Trajectory Null Scrolls in 3-Dimensional Minkowski Space-Time E³₁
On the Trajectory Null Scrolls in 3-Dimensional Minkowski Space-Time E³₁
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Soley Ersoy and Murat Tosun(Sakarya University)" ]
In this paper, the trajectory null scroll in 3-dimensional Minkowski space-time E³₁ is given by a firmly connected null oriented line moving with Cartan frame along null curve. Some theorems and results between curvatures of base curve and distribution pa- rameter of this surface are obtained. Moreover, some theorems a...
수학
null
kci_detailed_000040.xml
ART001243303
oai_dc
Maximal Hypersurfaces of (m+2)-Dimensional Lorentzian Space Forms
Maximal Hypersurfaces of (m+2)-Dimensional Lorentzian Space Forms
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Uur Dursun(Istanbul Technical University)" ]
We determine maximal space-like hypersurfaces which are the images of subbundles of the normal bundle of m-dimensional totally geodesic space-like submanifolds of an (m+ 2)-dimensional Lorentzian space form M₁^m+2 (c) under the normal exponential map. Then we construct examples of maximal space-like hypersurfaces of M₁...
수학
null
kci_detailed_000040.xml
ART001240729
oai_dc
Uniqueness Theorems For Differential Polynomials Concerning Fixed-Points
Uniqueness Theorems For Differential Polynomials Concerning Fixed-Points
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Meng Chao(Shandong University)" ]
In this article, we deal with the uniqueness problems on meromorphic functions concerning differential polynomials that share fixed-points. Moreover we extend former results of W. C. Lin and H. X. Yi.
수학
null
kci_detailed_000040.xml
ART001260727
oai_dc
A New Hilbert-type Integral Inequality with Some Parametersand Its Reverse
A New Hilbert-type Integral Inequality with Some Parametersand Its Reverse
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Zitian Xie(Zhaoqing University); Bicheng Yang()" ]
In this paper, by introducing some parameters and estimating the weight function, we give a new Hilbert-type integral inequality with a best constant factor. The equivalent inequality and the reverse forms are considered.
수학
null
kci_detailed_000040.xml
ART001240727
oai_dc
Second Order Impulsive Neutral Functional Differential Inclusions
Second Order Impulsive Neutral Functional Differential Inclusions
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Yicheng Liu(Changsha University); Zhixiang Li(Changsha University)" ]
In this paper, we investigate the existence of solutions of second order impulsive neutral functional differential inclusions which the nonlinearity F admits convex and non-convex values. Some results under weaker conditions are presented. Our results extend previous ones. The methods rely on a fixed point theorem for ...
수학
null
kci_detailed_000040.xml
ART001241003
oai_dc
Strong Convergence Theorems for Asymptotically NonexpansiveMappings by Hybrid Methods
Strong Convergence Theorems for Asymptotically NonexpansiveMappings by Hybrid Methods
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Xiaolong Qin(Tianjin Polytechnic University); Yongfu Su(Tianjin Polytechnic University); Meijuan Shang(Shijiazhuang University)" ]
In this paper, we prove two strong convergence theorems for asymptotically nonexpansive mappings in Hibert spaces by hybrid methods. Our results extend and improve the recent ones announced by Nakajo, Takahashi [K. Nakajo, W. Takahashi, Strong convergence theorems for nonexpansive mappings and nonexpansive semigroups, ...
수학
null
kci_detailed_000040.xml
ART001240728
oai_dc
Kato’s Inequalities for Degenerate Quasilinear Elliptic Operators
Kato’s Inequalities for Degenerate Quasilinear Elliptic Operators
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Toshio Horiuchi(Ibaraki University)" ]
Let N ≥ 1 and p > 1. Let Ω be a domain of Rⁿ. In this article we shall establish Kato’s inequalities for quasilinear degenerate elliptic operators of the form Apu = divA(x,▽u) for u ∈ Kp(Ω ), where Kp(Ω ) is an admissible class and A(x, €) : ×Rⁿ → Rⁿ is a mapping satisfying some structural conditions. If p = 2 for ex...
수학
null
kci_detailed_000040.xml
ART001241002
oai_dc
Growth order of Meromorphic Solutions of Higher-orderLinear Differential Equations
Growth order of Meromorphic Solutions of Higher-orderLinear Differential Equations
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Junfeng Xu(Shandong University); Zhanliang Zhang(Zhaoqing University)" ]
In this paper, we investigate higher-order linear differential equations with entire coefficients of iterated order. We improve and extend the result of L. Z. Yang by using the estimates for the logarithmic derivative of a transcendental meromorphic function due to Gundersen and the extended Wiman-Valiron theory by Wan...
수학
null
kci_detailed_000040.xml
ART001241001
oai_dc
Global Small Solutions of the Cauchy Problem for NonisotropicSchodinger Equations
Global Small Solutions of the Cauchy Problem for NonisotropicSchodinger Equations
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Xiangqing Zhao(Zhejiang Ocean University); Shangbin Cui(Sun Yat-Sen University)" ]
In this paper we study the existence of global small solutions of the Cauchy problem for the non-isotropically perturbed nonlinear Schr¨odinger equation: iut + △u + |u|^u + a ∑^d _i uxixixixi = 0, where a is real constant, 1 ≤ d < n is a integer, is a positive constant, and x = (x1, x2, · · · , xn) ∈ Rⁿ. For some admi...
수학
null
kci_detailed_000040.xml
ART001265162
oai_dc
Finitely Generated Modules over Semilocal Rings and Characterizationsof (Semi-)Perfect Rings
Finitely Generated Modules over Semilocal Rings and Characterizationsof (Semi-)Perfect Rings
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Chaehoon Chang(Kyungpook NationalUniversity)" ]
Lomp [9] has studied finitely generated projective modules over semilocal rings. He obtained the following: finitely generated projective modules over semilocal rings are semilocal. We shall give necessary and sufficient conditions for finitely generated modules to be semilocal modules. By using a lifting property, we ...
수학
null
kci_detailed_000040.xml
ART001241004
oai_dc
Another Look at Average Formulas of Nevanlinna CountingFunctions of Holomorphic Self-maps of the Unit Disk
Another Look at Average Formulas of Nevanlinna CountingFunctions of Holomorphic Self-maps of the Unit Disk
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "김홍오(KAIST)" ]
This is an extended version of the paper [K] of the author. The average formulas on the circles and disks around arbitrary points of Nevanlinna counting functions of holomorphic self-maps of the unit disk, given in terms of the boundary values of the selfmaps, are shown to give another characterization of the whole cla...
수학
null
kci_detailed_000040.xml
ART001240730
oai_dc
Finite Dimension in Associative Rings
Finite Dimension in Associative Rings
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Satyanarayana Bhavanari(Acharya Nagarjuna University); Nagaraju Dasari(Acharya Nagarjuna University); Balamurugan Kuppareddy Subramanyam(R. V. R and J. C. College of Engineering); Godloza Lungisile(Walter Sisulu University)" ]
The aim of the present paper is to introduce the concept “Finite dimension” in the theory of associative rings R with respect to two sided ideals. We obtain that if R has finite dimension on two sided ideals, then there exist uniform ideals U₁,U₂, · · · ,Un of R whose sum is direct and essential in R. The number n is i...
수학
null
kci_detailed_000040.xml
ART001240731
oai_dc
On the Generalized Hyers-Ulam-Rassias Stability for a FunctionalEquation of Two Types in p-Banach Spaces
On the Generalized Hyers-Ulam-Rassias Stability for a FunctionalEquation of Two Types in p-Banach Spaces
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "박규홍(Seowon University); Yong-Soo Jung(Seowon University)" ]
We investigate the generalized Hyers-Ulam-Rassias stability in p-Banach spaces for the following functional equation which is two types, that is, either cubic or quadratic: 2f(x + 3y) + 6f(x − y) + 12f(2y) = 2f(x − 3y) + 6f(x + y) + 3f(4y). The concept of Hyers-Ulam-Rassias stability originated essentially with the Th....
수학
null
kci_detailed_000040.xml
ART001073353
oai_dc
Asymptotic Behaviour of Another Second Order Mock Theta Function
Asymptotic Behaviour of Another Second Order Mock Theta Function
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Bhaskar Srivastava(Lucknow University)" ]
In this paper we show that the second order mock theta function, given by Hikami, is bounded and satisfies the second condition for the mock theta functions.
수학
null
kci_detailed_000040.xml
ART001075051
oai_dc
Oscillation of Linear Second Order Delay Dynamic Equations on Time Scales
Oscillation of Linear Second Order Delay Dynamic Equations on Time Scales
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Hassan Ahmed Agwo(Ain Shams University)" ]
In this paper, we establish some new oscillation criteria for a second-order delay dynamic equation u44(t) + p(t)u( (t)) = 0 on a time scale T. The results can be applied on differential equations when T = R, delay difference equations when T = N and for delay q−difference equations when T =qN for q > 1.
수학
null
kci_detailed_000040.xml
ART001073352
oai_dc
Toroidal Manifolds and Dehn Fillings on Links
Toroidal Manifolds and Dehn Fillings on Links
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Nabil Sayari(Universite de Moncton)" ]
Let M be a hyperbolic 3-manifold such that ∂M has at least two boundary tori ∂0M and ∂1M. Suppose that M contains an essential orientable surface P of genus g with one outer boundary component ∂0P, lying in ∂0M and having slope λ in ∂0M, and p inner boundary components ∂iP, i = 1, · · · , p, each having slope α in ∂1M....
수학
null
kci_detailed_000040.xml
ART001073356
oai_dc
-Morphic Rings
-Morphic Rings
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Qinghe Huang(Southeast University); Jianlong Chen(Southeast University)" ]
An element a in a ring R is called left morphic if R/Ra = l(a). A ring R is called left morphic if every element is left morphic. In this paper, an element a in a ring R is called left -morphic (resp. left G-morphic) if there exists a positive number n such that an (resp. an 6= 0) is left morphic. A ring R is called le...
수학
null
kci_detailed_000040.xml
ART001073351
oai_dc
Local Moves and Gordian Complexes, II
Local Moves and Gordian Complexes, II
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Yasutaka Nakanishi(Kobe University)" ]
By the works of Levine [2] and Rolfsen [5],[6], it is known that a local move called a crossing-change is strongly related to the Alexander invariant. In this note, we will consider to what degree the relationship is strong. Let K be a knot, and K× the set of knots obtained from a knot K by a singl crossing-change. Let...
수학
null
kci_detailed_000040.xml
ART001073563
oai_dc
Fuzzy Subalgebras of Type (α, β) in BCK/BCI-Algebras
Fuzzy Subalgebras of Type (α, β) in BCK/BCI-Algebras
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "전영배(경상대학교)" ]
Using the belongs to relation (2) and quasi-coincidence with relation (q) between fuzzy points and fuzzy sets, the concept of (, )-fuzzy subalgebras where and areany two of {2, q, 2 _q, 2 ^q} with 6=2 ^q was already introduced, and related properties were investigated (see [3]). In this paper, we give a condition fo...
수학
null
kci_detailed_000040.xml
ART001073350
oai_dc
Integrability and -convergence of Certain Cosine Sums
Integrability and -convergence of Certain Cosine Sums
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Jatinderdeep Kaur(Thapar Institute of Engg. and Tech.); Satvinder Singh Bhatia(Thapar Institute of Engg. and Tech.)" ]
In this paper, we extend the result of Ram [3] and also study the L1-convergence of the rth derivative of cosine series.
수학
null
kci_detailed_000040.xml
ART001073357
oai_dc
Some Theorems on Generating Functions
Some Theorems on Generating Functions
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Mahmood Ahmad Pathan(Aligarh Muslim University); Mohannad Jamal S. Shahwan(University of Bahrain)" ]
In this paper, we derive some generating relations involving Konhauser polynomials, Gauss, Humbert, Appell and Kamp´e de F´eriet hypergeometric functions with the help of four general theorems on generating functions (partly unilateral and partly bilateral) of one and two variables.
수학
null
kci_detailed_000040.xml
ART001073565
oai_dc
Entire Functions That Share One Value With Their Derivatives
Entire Functions That Share One Value With Their Derivatives
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Feng L(Shandong University); Junfeng Xu(Shandong University)" ]
In the paper, we use the theory of normal family to study the problem on entire function that share a finite non-zero value with their derivatives and prove a uniqueness theorem which improve the result of J.P. Wang and H.X. Yi.
수학
null
kci_detailed_000040.xml
ART001073564
oai_dc
On a Reverse Hardy-Hilbert's Inequality
On a Reverse Hardy-Hilbert's Inequality
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Bicheng Yang(Guangdong Institute of Education)" ]
This paper deals with a reverse Hardy Hilbert’s inequality with a best constant factor by introducing two parameters and. We also consider the equivalent form and the analogue integral inequalities. Some particular results are given.
수학
null
kci_detailed_000040.xml
ART001073349
oai_dc
Three Characteristic Beltrami System in Even Dimensions (Ⅰ) : -Harmonic Equation
Three Characteristic Beltrami System in Even Dimensions (Ⅰ) : -Harmonic Equation
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Gao Hongya(Hebei University); Chu Yuming(Huzhou Normal College); Sun Lanxiang(Cangzhou Teacher's College)" ]
This paper deals with space Beltrami system with three characteristic ma-trices in even dimensions, which can be regarded as a generalization of space Beltramisystem with one and two characteristic matrices. It is transformed into a nonhomoge-neous p-harmonic equation dA(x,dfI ) = dB(x,Df) by using the technique of out...
수학
null
kci_detailed_000040.xml
ART001073562
oai_dc
On Subclass of P-Valent Analytic Functions Defined by Integral Operators
On Subclass of P-Valent Analytic Functions Defined by Integral Operators
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Rasoul Aghalary(University of Urimia)" ]
Abstract. In the present paper we introduce the subclass S a,c(p,A,B) of analytic functions and then we investigate some interesting properties of functions belonging to this subclass. Our results generalize many results known in the literature and especially generalize some of the results obtained by Ling and Liu [5].
수학
null
kci_detailed_000040.xml
ART001073355
oai_dc
A Note on -Separative Modules
A Note on -Separative Modules
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Huanyin Chen(Zhejiang Normal University)" ]
A right R-module P is c-separative provided that P P c= P Q =) P = Q for any right R-module Q. We get, in this paper, two sufficient conditions under which a right module is c-separative. A ring R is a hereditary ring provided that every ideal of R is projective. As an application, we prove that every projective right ...
수학
null
kci_detailed_000040.xml
ART001073566
oai_dc
Generalizations of Dixon's and Whipple's Theorems on the Sum of a
Generalizations of Dixon's and Whipple's Theorems on the Sum of a
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Junesang Choi(Dongguk University); Dungar College(Govt. P. G. College); Shaloo Malani(); Arjun K. Rathie()" ]
In this paper we consider generalizations of the classical Dixon’s theorem and the classical Whipple’s theorem on the sum of a 3F2. The results are derived with the help of generalized Watson’s theorem obtained earlier by Mitra. A large number of results contiguous to Dixon’s and Whipple’s theorems obtained earlier by ...
수학
null
kci_detailed_000040.xml
ART001073354
oai_dc
Oscillation Criteria of Hyperbolic Equations with Continuous Deviating Arguments
Oscillation Criteria of Hyperbolic Equations with Continuous Deviating Arguments
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Zhongyue Han(Dezhou University); Yuanhong Yu(Chinese Academy of Sciences)" ]
In this paper, we shall consider a class of hyperbolic nonlinear differential equations with continuous deviating arguments. Some new sufficient conditions for oscillation of all solutions with two kinds of boundary conditions are obtained.
수학
null
kci_detailed_000040.xml
ART001073358
oai_dc
Vortex Filament Equation and Non-linear Schrdinger Equation
Vortex Filament Equation and Non-linear Schrdinger Equation
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Hongning Zhang(Beijing Jiaotong University); Faen Wu(Beijing Jiaotong University)" ]
In 1906, da Rios, a student of Leivi-Civita, wrote a master’s thesis modeling the motion of a vortex in a viscous fluid by the motion of a curve propagating in R3, in the direction of its binormal with a speed equal to its curvature. Much later, in 1971 Hasimoto showed the equivalence of this system with the non-linear...
수학
null
kci_detailed_000040.xml
ART001210265
oai_dc
Factor Algebras of Signed Brauer's Algebras
Factor Algebras of Signed Brauer's Algebras
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Chelliah Selvaraj(Periyar University)" ]
In this paper we obtain a decomposition of certain factors of the signedBrauer algebra into a direct sum of simple algebras and we obtain the structure of thefactor algebra.
수학
null
kci_detailed_000040.xml
ART001210267
oai_dc
Classification of Ruld Surfaces with Non-degenerate Second Fundamental Forms in Lorenz-Minkowski 3-spaces
Classification of Ruld Surfaces with Non-degenerate Second Fundamental Forms in Lorenz-Minkowski 3-spaces
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Sunmi Jung(Kyungpook National University); Young Ho Kim(Kyungpook National University); 윤대원(경상대학교)" ]
In this paper, we study some properties of ruled surfaces in a three-dimensional Lorentz-Minkowski space related to their Gaussian curvature, the second Gaussian curvature and the mean curvature. Furthermore, we examine the ruled surfaces in a three- dimensional Lorentz-Minkowski space satisfying the Jacobi condition f...
수학
null
kci_detailed_000040.xml
ART001210017
oai_dc
One-sided Prime Ideals in Semirings
One-sided Prime Ideals in Semirings
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Muhammad Shabir(Quaid-I-Azam University); Muhammad Sohail Iqbal(Quaid-I-Azam University)" ]
In this paper we define prime right ideals of semirings and prove that if every right ideal of a semiring R is prime then R is weakly regular. We also prove that if the set of right ideals of R is totally ordered then every right ideal of R is prime if and only if R is right weakly regular. Moreover in this paper we al...
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null
kci_detailed_000040.xml
ART001210268
oai_dc
Sagae-Tanabe Weighted Means and Reverse Inequalities
Sagae-Tanabe Weighted Means and Reverse Inequalities
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "안은경(경북대학교); 김세정(경북대학교); 이호수(경북대학교); 임영도(경북대학교)" ]
In this paper we consider weighted arithmetic and geometric means of several positive definite operators proposed by Sagae and Tanabe and we establish a reverse inequality of the arithmetic and geometric means via Specht ratio and the Thompson metric on the convex cone of positive definite operators.
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null
kci_detailed_000040.xml
ART001210264
oai_dc
A New Approach for the Derivation of a Discrete Approximation Formula on Uniform Grid for Harmonic Functions
A New Approach for the Derivation of a Discrete Approximation Formula on Uniform Grid for Harmonic Functions
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Philsu Kim(Kyungpook National University); Hyun Jung Choi(Kyungpook National University); Soyoung Ahn(Kyungpook National University)" ]
The purpose of this article is to &macr;nd a relation between the &macr;nite di?erence method and the boundary element method, and propose a new approach deriving a discrete approximation formula as like that of the &macr;nite di?erence method for harmonic functions. We develop a discrete approximation formula on a uni...
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null
kci_detailed_000040.xml
ART001210021
oai_dc
A Study of Modified H-transform and Fractional Integral Operator
A Study of Modified H-transform and Fractional Integral Operator
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Kantesh Gupta(Malviya National Institute of Technology)" ]
In this paper, we establish a theorem wherein we have obtained the image of modified H-transform under the fractional integral operator involving Foxs H-function. Three corollaries of this theorem have also been derived. Further, we obtain one interesting integral by the application of the third corollary. The importan...
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null
kci_detailed_000040.xml
ART001210269
oai_dc
A discrete model of brucellosis happened in Korean Iivestock farms
A discrete model of brucellosis happened in Korean Iivestock farms
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "박준표(Kyungpook National University); Byul Nim Kim()" ]
In this paper we introduce a discrete model of brucellosis happened in Korean livestock farms and numerically analyze its dynamical features. To do it, we consider parameters data supported by Livestock Cooperatives. To control brucellosis, we investigate the relationship among key parameters, as applications of our mo...
수학
null
kci_detailed_000040.xml
ART001210018
oai_dc
The Cauchy Representation of Integrable and Tempered Boehmians
The Cauchy Representation of Integrable and Tempered Boehmians
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Deshna Loonker(JNV University); Pradeep Kumar Banerji()" ]
This paper deals with, by employing the relation between Cauchy representation and the Fourier transform and properties of the former in L1-space, the investigation of the Cauchy representation of integrable Boehmians as a natural extension of tempered distributions, we have investigated Cauchy representation of temper...
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null
kci_detailed_000040.xml
ART001210019
oai_dc
Fractional Derivative Associated with the Multivariable Polynomials
Fractional Derivative Associated with the Multivariable Polynomials
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Vinod Bihari Lal Chaurasia(University of Rajasthan); Ashok Singh Shekhawat()" ]
The aim of this paper is to derive a fractional derivative of the multivariable H-function of Srivastava and Panda [7], associated with a general class of multivariable polynomials of Srivastava [4] and the generalized Lauricella functions of Srivastava and Daoust [9]. Certain special cases have also been discussed. Th...
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null
kci_detailed_000040.xml
ART001210020
oai_dc
Multiple Weakly Summing Multilinear Mappings and Polynomials
Multiple Weakly Summing Multilinear Mappings and Polynomials
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Sung Guen Kim(Kyungpook National University)" ]
In this paper, we introduce and study a new class containing absolutely summing multilinear mappings and polynomials, which we call multiple weakly summing multilinear mappings and polynomials. We investigate some interesting properties about multiple weakly (p; q1, · · · , qk)-summing multilinear mappings and polynomi...
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null
kci_detailed_000040.xml
ART001210016
oai_dc
Large Hydromagnetic Axisymmetric Instability of a Streaming Gas Cylinder Surrounded by Bounded Fluid with Non Uniform Field
Large Hydromagnetic Axisymmetric Instability of a Streaming Gas Cylinder Surrounded by Bounded Fluid with Non Uniform Field
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "A. E. Radwan(Ain Shams University); N. E. Elazab(Cairo University); M. A. Elogail(Ain Shams University)" ]
The magnetohydrodynamic axisymmetric instability of a streaming gas jet surrounded by bounded °uid with non-uniform &macr;eld has been developed. The problem is formulated, solved and the boundary conditions are applied across the interfaces. The eigenvalue relation is derived and discussed analytically and the results...
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null
kci_detailed_000040.xml
ART001210266
oai_dc
Prior Estimates and Solutions of Boundary Value Problems for Higher-order Nonlinear Finite Difference Equations
Prior Estimates and Solutions of Boundary Value Problems for Higher-order Nonlinear Finite Difference Equations
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Yuji Liu(Guangdong Universiry of Business Studies)" ]
Sufficient conditions for the existence of at least one solution of boundary value problems for higher order nonlinear difference equations are established. We allow f to be at most linear, superlinear or sublinear in obtained results.
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null
kci_detailed_000040.xml
ART001030086
oai_dc
Nonlinear Functional Boundary Value Problems in Banach Algebras Involving Carathodories
Nonlinear Functional Boundary Value Problems in Banach Algebras Involving Carathodories
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Bapurao C. Dhage(Gurukul Colony)" ]
In this paper, an existence theorem for a nonlinear two point boundary value problem of second order dierential equations in Banach algebras is proved using a nonlinear alternative based on Leray-Schauder alternative.
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null
kci_detailed_000040.xml
ART001099693
oai_dc
The First Four Terms of Kauffman's Link Polynomial
The First Four Terms of Kauffman's Link Polynomial
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Taizo Kanenobu(Osaka City University)" ]
We give formulas for the first four coe±cient polynomials of the Kauman’s link polynomial involving linking numbers and the coe±cient polynomials of the Kau- man polynomials of the one- and two-component sublinks. We use mainly the Dubrovnik polynomial, a version of the Kauman polynomial.
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null
kci_detailed_000040.xml
ART001099748
oai_dc
On Certain Novel Subclasses of Analytic and Univalent Functions
On Certain Novel Subclasses of Analytic and Univalent Functions
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Huseyin Irmak(Ba¸skent University); Santosh Bhaurao Joshi(Walchand College of Engineering); Ravinder Krishen Raina(M. P. University)" ]
The purpose of the present paper is to introduce two novel subclassesT (n;;) and H (n;;;) of analytic and univalent functions with negative coe-cients, involving Ruscheweyh derivative operator. The various results investigated in thispaper include coecient estimates, distortion inequalities, radii of close-to-convexity...
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null
kci_detailed_000040.xml
ART001030237
oai_dc
Factor Rank and Its Preservers of Integer Matrices
Factor Rank and Its Preservers of Integer Matrices
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Seok- Zun Song(Cheju National University); 강경태(Cheju National University)" ]
We characterize the linear operators which preserve the factor rank of integer matrices. That is, if M is the set of all m &pound; n matrices with entries in the integers and min(m; n) > 1, then a linear operator T on M preserves the factor rank of all matrices in M if and only if T has the form either T(X) = UXV for a...
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null
kci_detailed_000040.xml
ART001099691
oai_dc
Asymptotic Results for a Class of Fourth Order Quasilinear Difference Equations
Asymptotic Results for a Class of Fourth Order Quasilinear Difference Equations
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Ethiraju Thandapani(Peryiar University); Subbiah Pandian(Presidency College); Rajamannar Dhanasekaran(Dr. Ambedkar Government Arts college)" ]
In this paper, the authors rst classify all nonoscillatory solutions of equation(1) 2 j2yn j12yn+ qn jy (n )j1y (n ) = 0 ; n2 Ninto six disjoint classes according to their asymptotic behavior, and then they obtainnecessary and sucient conditions for the existence of solutions in these classes. Examplesare inserted to i...
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null
kci_detailed_000040.xml
ART001030883
oai_dc
Two More Radicals for Right Near-rings: The Right Jacobson Radicals of Type-1 and 2
Two More Radicals for Right Near-rings: The Right Jacobson Radicals of Type-1 and 2
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Ravi Srinivasa Rao(P. G. Centre); K. Siva Prasad(J. K. C. College)" ]
Near-rings considered are right near-rings and R is a near-ring. Jr 0 (R), the right Jacobson radical of R of type-0, was introduced and studied by the present authors. In this paper Jr 1 (R) and Jr 2 (R), the right Jacobson radicals of R of type-1 and type-2 are introduced. It is proved that both Jr 1 and Jr 2 are rad...
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null
kci_detailed_000040.xml
ART001099694
oai_dc
Generalized Weyl's Theorem for Some Classes of Operators
Generalized Weyl's Theorem for Some Classes of Operators
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Salah Mecheri(King Saud University)" ]
Let A be a bounded linear operator acting on a Hilbert space H. The B-Weyl spectrum of A is the set ¾Bw(A) of all ¸ 2 C such that A¡¸I is not a B-Fredholm operator of index 0. Let E(A) be the set of all isolated eigenvalues of A. Recently in [6] Berkani showed that if A is a hyponormal operator, then A satisfies genera...
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null
kci_detailed_000040.xml
ART001099692
oai_dc
Characterization of Function Rings Between C*(X) and C(X)
Characterization of Function Rings Between C*(X) and C(X)
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Dibyendu De(Krishnagar Women's College); Sudip Kumar Acharyya()" ]
Let X be a Tychono space and P(X) the set of all the subrings of C(X) that contain C¤(X). For any A(X) in P(X) suppose &Agrave;AX is the largest subspace of &macr;X containing X to which each function in A(X) can be extended continuously. Let us write A(X) &raquo; B(X) if and only if &Agrave;AX = &Agrave;BX, thereby de...
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null
kci_detailed_000040.xml
ART001030087
oai_dc
Oscillations of Difference Equations with Several Terms
Oscillations of Difference Equations with Several Terms
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Ozkan Ocalan(Afyon Kocatepe University)" ]
In this paper, we obtain su±cient conditions for the oscillation of every solution of the dierence equation xn+1 ¡ xn + i=1 pixn¡ki + qxn¡z = 0; n = 0; 1; 2; &cent; &cent; &cent; ; where pi 2 R, ki 2 Z for i = 1; 2; &cent; &cent; &cent; ;m and z 2 f¡1; 0g: Furthermore, we obtain su±cient conditions for the oscillation ...
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null
kci_detailed_000040.xml
ART001030084
oai_dc
A Non-uniform Bound on Matching Problem
A Non-uniform Bound on Matching Problem
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Kaint Teerapabolarn(Burapha University); Kritsana Neammanee(Chulalongkorn University)" ]
The aim of this paper is to use the Stein-Chen method to obtain a non-uniformbound on Poisson approximation in matching problem.
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null
kci_detailed_000040.xml
ART001030085
oai_dc
An Asymmetric Fuglede-Putnam's Theorem and Orthogonality
An Asymmetric Fuglede-Putnam's Theorem and Orthogonality
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Bachir Ahmed(King Khaled University); Abdelkder Segres()" ]
An asymmetric Fuglede-Putnam theorem forp-hyponormal operators andclass (Y) is proved, as a consequence of this result, we obtain that the range of the gener-alized derivation induced by the above classes of operators is orthogonal to its kernel.
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null
kci_detailed_000040.xml
ART001099642
oai_dc
Structure Eigenvectors of the Ricci Tensor in a Real Hypersurface of a Complex Projective Space
Structure Eigenvectors of the Ricci Tensor in a Real Hypersurface of a Complex Projective Space
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Chunji Li(Northeastern University); U-Hang Ki(Kyungpook National University)" ]
It is known that there are no real hypersurfaces with parallel Ricci tensor ina nonat complex space form ([6], [9]). In this paper we investigate real hypersurfacesin a complex projective space Pn C using some conditions of the Ricci tensorS which areweaker than r S = 0 :We characterize Hopf hypersurfaces ofPn C.
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null
kci_detailed_000040.xml
ART001099695
oai_dc
Explicit Formulas of the Generalized Inverse and Its Applications
Explicit Formulas of the Generalized Inverse and Its Applications
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Bin Deng(East China Normal University); Guo-Liang Chen(East China Normal University)" ]
In this paper, we present the explicit formula of the generalized inverse A(2) T;S, and we apply this result to solve restricted linear equation Ax + y = b; x 2 T; y 2 S and Ax + By = b; x 2 T; y 2 S.
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null
kci_detailed_000040.xml
ART001099696
oai_dc
New Lacunary Strong Convergence Difference Sequence Spaces Defined by Sequence of Moduli
New Lacunary Strong Convergence Difference Sequence Spaces Defined by Sequence of Moduli
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Vakeel A.Khan(A. M. U. Aligarh); Q. M. Danish Lohani(A. M. U. Aligarh)" ]
In this paper, we define 4m-Lacunary strongly convergent sequences defined by sequence of moduli and give various properties and inclusion relations on these sequence spaces.
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null
kci_detailed_000040.xml
ART001099697
oai_dc
On Idempotent Reflexive Rings
On Idempotent Reflexive Rings
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Jin Yong Kim(Kyung Hee University); Jong Uk Baik(Kyung Hee University)" ]
We introduce in this paper the concept of idempotent reflexive right ideals and concern with rings containing an injective maximal right ideal. Some known results for reflexive rings and right HI-rings can be extended to idempotent reflexive rings. As applications, we are able to give a new characterization of regular ...
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null
kci_detailed_000040.xml
ART001185306
oai_dc
On a Generalization of Closed Sets
On a Generalization of Closed Sets
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Miguel Caldas(Universidade Federal Fluminense); Maximilian Ganster(Graz University of Technology); Dimitrios N. Georgiou(University of Patras); Saeid Jafari(Roskilde University); Valeriu Popa(Bacau University)" ]
It is the objective of this paper to study further the notion of Λs-semi-θ-closed sets which is dened as the intersection of a θ-Λs-set and a semi-θ-closed set. Moreover, we introduce some low separation axioms using the above notions. Also we present and study the notions of Λs-continuous functions, Λs-compact spaces ...
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null
kci_detailed_000040.xml
ART001063605
oai_dc
Oscillation of Certain Second Order Damped Quasilinear Elliptic Equations via the Weighted Averages
Oscillation of Certain Second Order Damped Quasilinear Elliptic Equations via the Weighted Averages
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Yong Xia(Dongguan Institute of Technology); Zhiting Xu(South China Normal University)" ]
By using the weighted averaging techniques, we establish oscillation criteriafor the second order damped quasilinear elliptic dierential equationN.i,j =1Di(aij (x).Dy.p2Dj y) + .b(x),.Dy.p2Dy .+ c(x)f(y) = 0 , p > 1.The obtained theorems include and improve some existing ones for the undamped halflinear partial differe...
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null
kci_detailed_000040.xml
ART001063609
oai_dc
Minimization Method for Solving a Quadratic Matrix Equation
Minimization Method for Solving a Quadratic Matrix Equation
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "김현민(부산대학교)" ]
We show how the minimization can be used to solve the quadratic matrix equation and then compare two different types of conjugate gradient method which are Polak and Ribiere version and Fletcher and Reeves version. Finally,some results of the global and local convergence are shown.
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null
kci_detailed_000040.xml
ART001063614
oai_dc
The Seifert Matrices of Periodic Links with Rational Quotients
The Seifert Matrices of Periodic Links with Rational Quotients
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "이상율(부산대학교); Maeng-Sang Park(Pusan National University); 서명수(Pusan National University)" ]
In this paper, we characterize the Seifert matrices of p-periodic links whose quotients are 2-bridge linksC(2,n1,2,n2,· ,nr,(2)r) and give formulas for the sig-natures and determinants of the 3-periodic links of these kind in terms ofn1,n2,· ,nr.
수학
null
kci_detailed_000040.xml
ART001063603
oai_dc
The Basis Number of the Cartesian Product of a Path with a Circular Ladder, a Mobius Ladder and a Net
The Basis Number of the Cartesian Product of a Path with a Circular Ladder, a Mobius Ladder and a Net
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Maref Y. Alzoubi(Yarmouk University); Mohammed M. M. Jaradat(Yarmouk University)" ]
The basis number of a graph G is the least positive integerk such that Ghas a k-fold basis. In this paper, we prove that the basis number of the cartesian productof a path with a circular ladder, a Mobius ladder and path with a net is exactly 3. This improves the upper bound of the basis number of these graphs for a ge...
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null
kci_detailed_000040.xml
ART001063612
oai_dc
Commuting Pair Preservers of Matrices
Commuting Pair Preservers of Matrices
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Seok-Zun Song(Cheju National University); Jin-Young Oh(Cheju National University)" ]
There are many papers on linear operators that preserve commuting pairs of matrices over elds or semirings. From these research works, we have a motivation to theresearch on the linear operators that preserve commuting pairs of matrices over nonneg-ative integers. We characterize the surjective linear operators that pr...
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null
kci_detailed_000040.xml
ART001063611
oai_dc
Injective JW-algebras
Injective JW-algebras
{ "journal_name": "경북대학교 자연과학대학 수학과", "publisher": null, "pub_year": null, "pub_month": null, "volume": null, "issue": null }
[ "Fatmah Backer Jamjoom(King Saud University)" ]
Injective JW-algebras are dened and are characterized by the existence of projections of norm 1 onto them. The relationship between the injectivity of a JW-algebra and the injectivity of its universal enveloping von Neumann algebra is established. The Jordan analgue of Theorem 3 of [3] is proved, that is, a JC-algebra ...
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null
kci_detailed_000040.xml