content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
the encyclopedic entry of Well-founded_relation
In
mathematics
, a
binary relation
,
R
, is
well-founded
(or
wellfounded
) on a
class X
if and only if every non-
empty subset
of
X
has a
minimal element
with respect to
R
; that is, for every non-
empty subset S
of
X
, there is an element
m
of
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The Number of Students Needed for Undecided Programs at a College from the Supply-Chain Viewpoint
Mathematical Problems in Engineering
Volume 2012 (2012), Article ID 276519, 12 pages
http://dx.doi.org/10.1155/2012/276519
Research Article
The Number of Students Needed for Undecided Programs at a College from the Suppl... | 5 | [
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... | 28,801 | 28801 | |
the encyclopedic entry of quantum tunneling
Quantum mechanics is the study of mechanical systems whose dimensions are close to the atomic scale, such as molecules, atoms, electrons, protons and other subatomic particles. Quantum mechanics is a
fundamental branch of physics with wide applications. Quantum theory general... | 4 | [
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Evaluating Double Integrals
April 15th 2008, 04:22 AM
Warrick2236
Evaluating Double Integrals
Calculate the double integrals:
I)
IntInt R (x-y^2)dA
where R is the region bounded by the curves y = x^2 and y = x^3
II)
IntInt D x^3 sin(y^3)dydx
where D is the region bounded by the parabo... | 4 | [
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Prove measurability
September 8th 2011, 02:26 PM #1
Prove measurability
Let $f = (f_1, f_2): \Omega \to E \times F$.
Show that $f : (\Omega,\mathcal{A}) \to (E \times F, \mathcal{E} \otimes \mathcal{F})$ is measurable if and only if $f_1$ is measurable from $(\Omega,\mathcal{A})$ to $(E, \mathcal{E})$ and $f_... | 5 | [
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Find tan(A - B)
August 25th 2008, 03:01 AM #1
MHF Contributor
Joined
Jul 2008
From
NYC
Posts
1,489
Find tan(A - B)
Find tan(A - B) given the following:
tanA = 5/12, pi < A < 3pi/2; sinB = -1/2, pi < B < 3pi/2
NOTE: The red above indicates the given side condition.
two main ways to go a... | 4 | [
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Enhancement of the Quality and Robustness in Synchronization of Nonlinear Lur'e Dynamical Networks
Mathematical Problems in Engineering
Volume 2012 (2012), Article ID 236782, 22 pages
http://dx.doi.org/10.1155/2012/236782
Research Article
Enhancement of the Quality and Robustness in Synchronization of Nonlinear Lur'e... | 4 | [
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The Semianalytical Solutions for Stiff Systems of Ordinary Differential Equations by Using Variational Iteration Method and Modified Variational Iteration Method with Comparison to Exact Solutions
Mathematical Problems in Engineering
Volume 2013 (2013), Article ID 143915, 11 pages
http://dx.doi.org/10.1155/2013/143915
... | 5 | [
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Limits of Functions in Real Analysis
October 19th 2010, 05:51 PM #1
Member
Joined
Oct 2010
Posts
133
Limits of Functions in Real Analysis
Alright, I need some guidance with the following problem. Any help would be appreciated.
Suppose $lim_{x\rightarrow x_{0}}f(x)=b$ and given any $r>0$ the set $f(B'... | 5 | [
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Solve System
x^y=y^x x^x=y^(9y) I need this in next few hours please help :(
x^2=9y^2 y=x/3 x^x=y^(9*x/3) x^x=y^(3x) I got this so far< When I use x=3y and plugin to first equation I get to 3y^y=y^(3y) I did it and i got x=0 and y=0
$x^2 = 9y^2 \therefore x = \pm 3y$. Case 1: x = 3y. $(3y)^{3y} = y^{9y} \Rightarrow 3... | 4 | [
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Proof of the rotation matrix
Hello. Somebody knows some proof for the cosθ-sinθ sinθ cosθ rotation matrix? Ι can't compromize for the minus sign. Thanks.
Last edited by konstantinos; May 28th 2013 at 01:15 AM.
Say you want to rotate a point \displaystyle \begin{align*} (x, y) \end{align*} to \displaystyle \begin{alig... | 4 | [
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Spatial Central Configurations with Two Twisted Regular 4-Gons
Journal of Applied Mathematics
Volume 2013 (2013), Article ID 315976, 6 pages
http://dx.doi.org/10.1155/2013/315976
Research Article
Spatial Central Configurations with Two Twisted Regular 4-Gons
^1School of Electronic Engineering, UEST Of China, Chengd... | 5 | [
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Investigation of Through-Thickness Stresses in Composite Laminates Using Layerwise Theory
International Journal of Engineering Mathematics
Volume 2013 (2013), Article ID 676743, 11 pages
http://dx.doi.org/10.1155/2013/676743
Research Article
Investigation of Through-Thickness Stresses in Composite Laminates Using Lay... | 4 | [
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A Nonoverlapping Domain Decomposition Method for an Exterior Anisotropic Quasilinear Elliptic Problem in Elongated Domains
Mathematical Problems in Engineering
Volume 2013 (2013), Article ID 828615, 16 pages
http://dx.doi.org/10.1155/2013/828615
Research Article
A Nonoverlapping Domain Decomposition Method for an Ext... | 4 | [
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Ellipses and Circles
December 7th 2010, 02:00 AM #1
Newbie
Joined
Oct 2010
Posts
18
Ellipses and Circles
An ellipse is drawn with maximum radius 4 cm and minimum radius 3 cm. A circle is drawn, as shown in the figure, such that any two tangents of the ellipse that meet on the circle make 90⁰ with
eac... | 4 | [
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Area of the quadrilateral
1. August 14th 2010, 12:34 AM #1
2. August 14th 2010, 10:12 AM #2
The triangles BOC, OQC, on the same base BQ, have the same "height" (namely the perpendicular distance from C to BQ). Since the area of BOC is twice the area of OQC, it follows that $BO =
2OQ$. By a similar... | 4 | [
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[SOLVED] Double angle problem
it says to prove 1+sin2x=(sinx+cosx)^2 so I'm stuck i have tried 1+2sinxcosx=1-2sin^2x and 1+2sinxcosx=cos2x ... I need help. Thanks.
$(\sin{x}+\cos{x})^2 = \sin^2{x} + 2\sin{x}\cos{x} + \cos^2{x}$ $= \sin^2{x} + \cos^2{x} + 2\sin{x}\cos{x}$ $= 1 + \sin{(2x)}$ because $\sin^2{x} + \cos^2{... | 4 | [
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Vector Calculus
July 27th 2008, 03:23 PM #1
Newbie
Joined
Jul 2008
Posts
11
Vector Calculus
1) Show that the vector field F = (3x^2)i + (5z^2)j + (10yz)k is irrotional. Then find a potential function f(x,y,z) such that gradient f = F.
(Ok, so i got the part of showing that F is irrotional. But when ... | 5 | [
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[SOLVED] Train Problem
October 20th 2009, 09:50 AM
warriors837
[SOLVED] Train Problem
A car cruising at 65 mph, passes a train from the back to the front, in 2 minutes. At the same instant, another car, that is also traveling at 65 mph, moves from the front of the back of the
train in 10 seconds. If the trai... | 4 | [
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The Perturbed Dual Risk Model with Constant Interest and a Threshold Dividend Strategy
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 981076, 9 pages
http://dx.doi.org/10.1155/2013/981076
Research Article
The Perturbed Dual Risk Model with Constant Interest and a Threshold Dividend Strategy
College of ... | 5 | [
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nature of roots
July 18th 2009, 05:49 AM
thereddevils
nature of roots
Determine the condition to be satisfied by k such that the expression 2x^2+6x+1+k(x^2+2) is positive for all x belongs to real numbers .
Let 2x^2+6x+1+k(x^2+2)=0
(2+k)x^2+6x+1+2k=0
The graph must be a 'floating' graph on the pos... | 4 | [
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Using De Moivre's Theorem
March 24th 2011, 12:05 PM #1
Using De Moivre's Theorem
Hello,
Doing a practice paper and found this question, not sure what to do:
Write down de Moivre's Theorem for n=5. hence show that for $\sin \theta eq 0$
$\frac{\sin 5 \theta}{\sin \theta} = A cos^4 \theta + B \cos^2 \... | 4 | [
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Binomial expansions
August 20th 2010, 06:35 AM
hooke
Binomial expansions
Find, in the simplest form, the coefficient of x^n in the binomial expansion of (1-x)^(-6).
Hence, find the coefficient of x^6 and x^7 in (1+2x+3x^2+4x^3+5x^4+6x^5+7x^6)^3
Attempt:
The generalised binomial theorem,
$\sum... | 5 | [
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Dynamical Behaviors of Stochastic Hopfield Neural Networks with Both Time-Varying and Continuously Distributed Delays
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 631734, 9 pages
http://dx.doi.org/10.1155/2013/631734
Research Article
Dynamical Behaviors of Stochastic Hopfield Neural Networks with Both... | 5 | [
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opsiser
You are currently browsing opsiser’s articles.
Our goal is to understand the structure of subgroups of graphs of groups. This will enable us to prove things like: $F \ast_{z} F$ is LERF.
Exercise 22. A group is coherent if every fg subgroup is fp. Prove that $\pi_1$ of a finite graph of groups with coherent v... | 4 | [
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volumes rotate about y axis
April 27th 2010, 02:57 AM #1
Member
Joined
Dec 2008
From
Australia
Posts
161
volumes rotate about y axis
The region of the curve $y = \frac{e^x}{x}$ bounded by x = 1 and x = 2 and y = 0, is rotated about the y axis. Find the volume of the solid.
i drew the diagram and... | 5 | [
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basic algebra
October 11th 2005, 09:41 AM
>>z<<
basic algebra
If Steven can mix 20 drinks in 5 minutes, Sue can mix 20 drinks in 10 minutes, and Jack can mix 20 drinks in 15 minutes, how much time will it take all 3 of them working together to mix the 20
drinks?
is there a rule for this??!
October 11th ... | 4 | [
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-0.008544921875,
0.00... | 28,826 | 28826 | |
Global Strong Solutions to Some Nonlinear Dirac Equations in
Super-Critical Space
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 602753, 8 pages
http://dx.doi.org/10.1155/2013/602753
Research Article
Global Strong Solutions to Some Nonlinear Dirac Equations in Super-Critical Space
Department of Mathem... | 5 | [
-0.201171875,
-0.04931640625,
0.00946044921875,
-0.0205078125,
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-0.01507568359375,
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xample
Average Example 1
Problem Find the average, and average deviation for the following data on the length of a pen, L. We have 5 measurements,
(12.2, 12.5, 11.9,12.3, 12.2) cm.
┏━━━━━━━━━━━━━━━━━━━━━━━┯━━━━━━━━━━━━━┯━━━━━━━━━━┓
┃Length (cm) │ │ ┃
┠───────────────────────┼──────────... | 4 | [
0.0771484375,
-0.0033721923828125,
0.0712890625,
-0.041015625,
-0.0189208984375,
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-0.... | 28,828 | 28828 | |
Change of Basis
December 2nd 2010, 07:07 AM
BrianMath
Change of Basis
Let $V \subset R^3$ be the plane defined by the equation $2x_1 + x_2 =0. Let T:R^3 \rightarrow R^3$ be the linear transformation defined by reflecting across V. Find the standard matrix for T.
This should be done using change of basis for... | 4 | [
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0.004608154296875,
0.04541015625,
-0.03735351... | 28,829 | 28829 | |
GCD question
January 27th 2011, 05:38 PM #1
Junior Member
Joined
Nov 2010
Posts
40
GCD question
if $m>0$
show that
$m(a,b)=(ma,mb)$
I'm told that $(ma,mb) = max + mby = m(ax + by) = m(a,b)$
isn't sufficient... why?
$\text{let} \ d=\text{gcd}(ma,mb) \ \ \text{and} \ \ c=\text{gcd}(... | 4 | [
0.024658203125,
-0.0086669921875,
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0.046875,
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0.0086669921875,
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0.05810546875,
0.080078125,
0.01263427734375,
... | 28,830 | 28830 | |
statistics problem
June 9th 2008, 06:22 PM
craminator66
statistics problem
Thanks in advance.
Consider the simple linear regression of Y, average total sleep time per 24 hour period (ASTD) on X, age of the young child (AGE). Do not use a regression program, rather run the calculations
yourself on you ... | 4 | [
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0.03198... | 28,831 | 28831 | |
When an integer Z is divided by 3, it leaves 1 as a
Author Message
TAGS:
When an integer Z is divided by 3, it leaves 1 as a [#permalink] 15 Jul 2003, 08:54
... | 4 | [
-0.055419921875,
0.0595703125,
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0.01... | 28,832 | 28832 | |
proving (by induction)
August 30th 2009, 08:29 AM
nh149
proving (by induction)
Suppose the numbers a0,a1,a2,....,an satisfy the following conditions:
a0= 1/2, ak+1 =ak + (1/n) ((ak)^2) for k=0,1,2,...,n-1.
Prove that (n+1)/( 2n-k+2) <ak < (n)/(2n-k )
for k=1,2,3,....,n
August 30th 2009, 04:50... | 5 | [
-0.051513671875,
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... | 28,833 | 28833 | |
automorphism group of a cyclic group
April 9th 2009, 03:43 PM #1
Junior Member
Joined
Oct 2008
Posts
36
automorphism group of a cyclic group
Hi guys,
Is the automorphism group of a cyclic group always abelian?
I believe so but I need to prove it. I don't really know where to start...any ideas?
... | 5 | [
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... | 28,834 | 28834 | |
Optimal Power Management of a DISCO with Integrations of Reliability Considerations and Wind Farm Based on Benders Decomposition
Mathematical Problems in Engineering
Volume 2011 (2011), Article ID 812364, 24 pages
http://dx.doi.org/10.1155/2011/812364
Research Article
Optimal Power Management of a DISCO with Integrat... | 4 | [
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-0.004425048828125... | 28,835 | 28835 | |
compute the directional derivatives
November 16th 2008, 03:41 AM #1
Newbie
Joined
Nov 2008
Posts
3
compute the directional derivatives
Hi!
There is an exam on Tuesday.
I have no idea of these problems.
Please help~~ Thank you^^
Compute the directional derivatives of the following functio... | 4 | [
-0.0267333984375,
0.00048065185546875,
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0.0118408203125,
-0.0927734375,
-0.073242... | 28,836 | 28836 | |
Maclaurin expansion
June 8th 2010, 04:54 PM #1
Newbie
Joined
Apr 2010
Posts
11
Maclaurin expansion
A question says use Maclaurin's theorem to expand $\cos^2{x}$ upto the term containing $x^6$. Hence or otherwise, express $x+\sin^2{x}$ as a power series upto a term containing $x^6$.
$f(x) = f(0)+f'(0... | 5 | [
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0.01049... | 28,837 | 28837 | |
The kinematics and dynamics of non-Cartesian actuators and robotics
Non-Cartesian actuators are improving applications where they weren't even feasible before. Full definition of their dynamics and kinematics helps designers extract maximum performance from these
systems.
For years, most motion system designers wantin... | 4 | [
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Emerging Carbon Nanotube Electronic Circuits, Modeling, and Performance
VLSI Design
Volume 2010 (2010), Article ID 864165, 8 pages
http://dx.doi.org/10.1155/2010/864165
Research Article
Emerging Carbon Nanotube Electronic Circuits, Modeling, and Performance
^1Department of Electrical and Computer Engineering, Louisi... | 4 | [
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0.006896972656... | 28,839 | 28839 | |
the encyclopedic entry of niels abel
In
mathematics
,
Abel's test
(also known as
Abel's criterion
) is a method of testing for the
convergence
of an
infinite series
. The test is named after mathematician
Niels Abel
. There are two slightly different versions of Abel's test – one is used with series of real... | 4 | [
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... | 28,840 | 28840 | |
Fixed Point Theorems on Nonlinear Binary Operator Equations with Applications
Discrete Dynamics in Nature and Society
Volume 2014 (2014), Article ID 241942, 4 pages
http://dx.doi.org/10.1155/2014/241942
Research Article
Fixed Point Theorems on Nonlinear Binary Operator Equations with Applications
Department of Mathe... | 5 | [
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... | 28,841 | 28841 | |
[SOLVED] Density function
October 3rd 2008, 04:41 AM #1
Newbie
Joined
Sep 2008
Posts
23
[SOLVED] Density function
I've got this problem:
f(y) = $(1/\alpha)my^{m-1}e^{{-y}^{m}/\alpha}$, y>0
0, elsewhere
Now I'm supposed to find $E(Y^k)$ for any positive integer k.
I start out like this:
... | 5 | [
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0.0208740234375,
0.0159912109375,... | 28,842 | 28842 | |
transformations of trigonometric graphs
August 3rd 2010, 04:11 PM
shimmerblade
transformations of trigonometric graphs
Hey guys just asking a question about transformations of trigonometric graphs
h = Hcos (tπ/6)
Find t when h = 2.5
H = 3 (height of the high tide in meters)
T = 12
a high t... | 4 | [
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0.010009765625,
... | 28,843 | 28843 | |
Homework Help
Posted by Anon on Friday, January 20, 2012 at 3:34pm.
QUESTION 1
Joe intercepts a pass 8 yards into the end zone, 19 yards from the right side of the field as he faces the opposite end of the field (see figure). He starts running diagonally, moving at a rate of 4
yd/s down the field and 2 yd/s across th... | 4 | [
-0.000010192394256591797,
0.04248046875,
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0.07861328125,
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0.04150390625,
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0.07421875,
0.007476806640625,
0.10693359375,
-0.07861328125,
-0.04... | 28,844 | 28844 | |
Absolute Value Equations
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
┃ Absolute Value Equations ┃
┃ Topic Index | Algebra2/Trig Index | Regents Exam Prep Center┃
┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
... | 4 | [
-0.0240478515625,
0.035888671875,
-0.004974365234375,
0.0390625,
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0.0556640625,
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0.07373046875,
0.0062255859375,
-... | 28,845 | 28845 | |
Calculate the bias of the estimator
March 28th 2011, 12:25 PM
jmyers12345
Calculate the bias of the estimator
Suppose that Y_1,...,Y_n is a random sample where the density of each random variable Y_i is f(y) = 2*x^2*y^(-3), y >= x for some parameter x > 1. Let x^hat := min{Y_1,...,Y_n}.
I figured out that t... | 4 | [
-0.07080078125,
-0.017822265625,
-0.01953125,
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0.025634765625,
0.002838134765625,... | 28,846 | 28846 | |
algebra problem
February 11th 2008, 09:03 PM
sarahh
algebra problem
How can we show that there are no (x,y) pairs of real numbers that satisfy xy = 3 and (x + y)^2 = 10 ? Intuitively it's obvious but I'm not sure exactly how to show it..
February 11th 2008, 09:23 PM
mr fantastic
Quote:
Brute force:
... | 4 | [
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-0.029296... | 28,847 | 28847 | |
Topology Quotient Space
May 17th 2008, 01:08 PM #1
Junior Member
Joined
Jul 2006
From
Darmstadt, Germany
Posts
44
Topology Quotient Space
In Topology 2ed by Munkres, the following definition is given of a quotient map:
Let $X,Y$ be topological spaces; let $p:{X}\rightarrow{Y}$ be a surjective ma... | 5 | [
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-0.020751953125,
-0.... | 28,848 | 28848 | |
Generating functions
November 13th 2009, 12:33 PM #1
Junior Member
Joined
Nov 2009
Posts
37
A jar of 50 quarters and 20 loonies is to be divided amongst Alex, Kim, and Julie. How many
ways can this be done if Alex gets no quarters, Kim gets no loonies but at least 10 quarters,
and Julie gets an od... | 5 | [
-0.0225830078125,
0.03515625,
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0.10595703125,
0.0211181640625,... | 28,849 | 28849 | |
An Adaptive Prediction-Correction Method for Solving Large-Scale Nonlinear Systems of Monotone Equations with Applications
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 619123, 13 pages
http://dx.doi.org/10.1155/2013/619123
Research Article
An Adaptive Prediction-Correction Method for Solving Large-Sca... | 5 | [
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0.0198... | 28,850 | 28850 | |
Homework Help
Posted by James on Tuesday, April 8, 2008 at 8:22pm.
A person deposits money into a retirement account, which pays 7% interest compounded continuously, at a rate of $1000 per year for 20 years. Calculate:
a. The balance of the account at the end of 20 years
b. the amount of money actually deposited int... | 4 | [
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0.0299072265625,
-0.1435546875,
0.02539062... | 28,851 | 28851 | |
length of curve
May 19th 2007, 04:22 PM #1
Member
Joined
Oct 2006
Posts
88
length of curve
from t=0 to t=pi/2
x=e^-t cost
y=e^-t sint
dx/dt = -e^-t cost - e^-t sint
dy/dt = -e^-t sint + e^-t cost
(dx/dt)^2 = ?
(dy/dt)^2 = ?
L = (int 0 to pi/2) [sqrt(-2e^-2t)]dt
how do ... | 5 | [
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-0.007720947265625,
-0.080078125,
0.016... | 28,852 | 28852 | |
Question in Advanced Algebra
November 21st 2012, 11:29 AM #1
Junior Member
Question in Advanced Algebra
Re: Question in Advanced Algebra
it suffices to exhibit just ONE counter-example, so let's pick an easy A to work with:
let A = Z+Z, the direct sum of the additive group (Z,+), where Z is the integers we... | 5 | [
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0.01324462890625,
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-0.005859375,
0.0003643035888671875,
0.014404296875,
-0.051513671875,
0.0242919921... | 28,853 | 28853 | |
the encyclopedic entry of conic section
In mathematics, conic sections are relations which represent the equation of the curve (or curves) that result from passing a plane through a cone.
Circles
Definition: The
locus
of all points in a plane which are equidistant from a given point. This given point is known as th... | 4 | [
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Finding the inverse of this function
September 21st 2009, 06:32 PM
letzdiscuss
Finding the inverse of this function
f(x) = 3 + x^2 + tan(pi(x/2)) , -1 < x < 1
I found the inverse and it was:
3 + y^2 + tan(pi(y/2)), -1 < y < 1
Correct me if I was wrong.
Then the question asks me to find f(f^-1(... | 4 | [
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-0.03637... | 28,855 | 28855 | |
[MATLAB] Optimization - Reduce Step size?
September 18th 2009, 10:42 PM
elbarto
[MATLAB] Optimization - Reduce Step size?
Hi All,
I have made a number of post lately relating to this problem so I thought I would make a decent post and highlight exactly what my problem is so that hopefully I can get some feed... | 4 | [
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induction and recursion
October 24th 2009, 01:56 PM
zpwnchen
induction and recursion
Quote:
give a recursive definaition of the sequence { ${a_n}$} , n=1,2,3,...
a) $a_n = 1+(-1)^n$
b) $a_n = n(n+1)$
c) $a_n = n^2$
help me how to define them
October 24th 2009, 02:47 PM
proscientia
(a... | 4 | [
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Derivatives and Tangent Lines
February 24th 2010, 09:04 AM
Jools
Derivatives and Tangent Lines
Hey. I have a question here I was hoping to get a hand with.
Determine the slope of the tangent at x = 3 for the function :
f(x) = (4x^3) / sinx
Note -- x is measured in radians
I've gotten the deri... | 5 | [
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[SOLVED] Normal Distrubtion Question
April 15th 2008, 10:21 PM #1
[SOLVED] Normal Distrubtion Question
Question:
Given that $X \sim N(44,25)$, find $t$ correct to 2 decimal places when
$P(X \geq t)=0.7704$
Attempt:
$= P(X \geq t)=0.7704$
$\mu = 44$ , $\sigma^2 = 25$, $\sigma= 5$
$= P(\... | 5 | [
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AP Statistic Confidence Intervals
March 8th 2013, 04:17 PM
serenamae1216
AP Statistic Confidence Intervals
Please help!!! I cant figure out how to solve this
The following data is the age at death (in days) for infants who died from sudden infant death syndrome (SIDS). Construct a 95% confidence interval fo... | 5 | [
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Multivariate Time Series Similarity Searching
The Scientific World Journal
Volume 2014 (2014), Article ID 851017, 8 pages
http://dx.doi.org/10.1155/2014/851017
Research Article
Multivariate Time Series Similarity Searching
College of Computer & Information, Hohai University, Nanjing 210098, China
Received 21 Februa... | 4 | [
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A Mathematical Model for Optimal Management and Utilization of a Renewable Resource by Population
Journal of Mathematics
Volume 2013 (2013), Article ID 613706, 9 pages
http://dx.doi.org/10.1155/2013/613706
Research Article
A Mathematical Model for Optimal Management and Utilization of a Renewable Resource by Populati... | 5 | [
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Measurement of the Quasi-Two-Body
Advances in High Energy Physics
Volume 2013 (2013), Article ID 989843, 4 pages
http://dx.doi.org/10.1155/2013/989843
Research Article
Measurement of the Quasi-Two-Body B Decays
Physics Department, Semnan University, P.O. Box 35195-363, Semnan, Iran
Received 13 December 2012; Revis... | 4 | [
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Through-Wall Image Enhancement Based on Singular Value Decomposition
International Journal of Antennas and Propagation
Volume 2012 (2012), Article ID 961829, 20 pages
http://dx.doi.org/10.1155/2012/961829
Research Article
Through-Wall Image Enhancement Based on Singular Value Decomposition
Department of Electrical E... | 4 | [
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Of all the attendees at a dinner party, 40% were women. If
Author Message
TAGS:
Of all the attendees at a dinner party, 40% were women. If [#permalink] 20 Dec 2006, 13:03
... | 4 | [
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Proof by Induction - Divisibility Proofs
September 25th 2011, 02:43 PM #1
Member
Joined
Jul 2011
Posts
140
Proof by Induction - Divisibility Proofs
Prove by induction that 13^n - 6^(n - 2) is divisible by 7, n subset N.
Step 1: n = 1...
13^1 - 6^(1 - 2) = 13 - 6^-1 = 13 - 0.1666 = 12.833
C... | 4 | [
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Math- Calculus
Posted by Olivis on Sunday, October 21, 2012 at 11:46pm.
A 20 foot ladder is sliding down a vertical wall at a constant rate of 2 feet per second.
a) How fast is the ladder moving away from the wall when the base of the ladder is 12 feet away from the wall?
b) Find the rate of change at which the angl... | 5 | [
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[Haskell-cafe] Induction (help!)
Dan Weston westondan at imageworks.com
Tue May 6 21:30:08 EDT 2008
Ryan Ingram wrote:
>
> One point to remember is that structural induction fails to hold on
> infinite data structures:
As I understand it, structural induction works even for infinite data
structures if you remember ... | 5 | [
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Lipschitz Estimates for Fractional Multilinear Singular Integral on Variable Exponent Lebesgue Spaces
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 632384, 6 pages
http://dx.doi.org/10.1155/2013/632384
Research Article
Lipschitz Estimates for Fractional Multilinear Singular Integral on Variable Exponen... | 5 | [
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0.046875,... | 28,869 | 28869 | |
Average Conditions for the Permanence of a Bounded Discrete Predator-Prey System
Discrete Dynamics in Nature and Society
Volume 2013 (2013), Article ID 508686, 5 pages
http://dx.doi.org/10.1155/2013/508686
Research Article
Average Conditions for the Permanence of a Bounded Discrete Predator-Prey System
School of Mat... | 5 | [
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Flow Rida (m05q09)
Author Message
Flow Rida (m05q09) [#permalink] 12 Nov 2008, 12:23
2
This post was
BOOKMARKED
... | 4 | [
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Squaring a radical
June 28th 2011, 12:38 AM
KingNathan
Squaring a radical
When plugging in the area of a circle formula, I ran into something I can't figure out.
Lets say that the radius is (5 sqr root of 2/2) Its a fraction. When plugging it into the formula, it becomes (5 sqr root of 2/2)^2. I know the co... | 4 | [
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... | 28,872 | 28872 | |
Partial Fractions
July 9th 2008, 10:26 AM #1
Senior Member
Joined
Jul 2007
Posts
290
Partial Fractions
I'm not certain why but I can't seem to get the right answer no matter how many times I run through this
Integrate (x^2) / ((x - 3)(x + 2)^2)
(A / x - 3) + (B / x + 2) + (C / (x + 2)^2)
... | 5 | [
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0.02... | 28,873 | 28873 | |
Index t of cyclic subgroup + isomorphism question
November 7th 2012, 11:30 AM #1
Junior Member
Joined
Oct 2012
From
Ohio
Posts
48
Index t of cyclic subgroup + isomorphism question
Given: the abelian group Z*13 and the element, 5, of Z*13. Find the index t of the cyclic subgroup <5>. List the t distin... | 5 | [
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0.003265... | 28,874 | 28874 | |
Solving Algebraic Fractions
October 16th 2010, 02:39 PM
louis058
Solving Algebraic Fractions
I'm having to solve some algebraic fractions, which is like normal algebra, but with fractions involved basically. I've got this:
$<br /> \frac{1}{x+1}+\frac{1}{x-1}=4<br />$
And through algebra, I've got to th... | 4 | [
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-0.054931640625,... | 28,875 | 28875 | |
simple simplification
July 5th 2009, 12:43 PM #1
Member
Joined
Jun 2007
Posts
120
simple simplification
Im just confused as to how this step (1) [ -ln l 150 - y l = (t / 200) - ln 130 ], simplified into this (2) l 150 - y l = 130e^(-t/200)
The only part i dont understand about this is how (t/200) in... | 4 | [
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Stability of Impulsive Neural Networks with Time-Varying and Distributed Delays
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 325310, 10 pages
http://dx.doi.org/10.1155/2013/325310
Research Article
Stability of Impulsive Neural Networks with Time-Varying and Distributed Delays
^1School of Information ... | 5 | [
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Differentiation- Quotient Rule
Calculate the gradient of the tangent to the curve $y=\frac{x+2}{\sqrt{3x+1}}$ at $x=1$
If your question is to calculate the derivative of the function here is step by step $y=\frac{x+2}{\sqrt{3x+1}} \rightarrow y'=\frac{(x+2)'(\sqrt{3x+1}) - (\sqrt{3x+1})'(x+2)}{3x+1}$ The derivate of
$... | 5 | [
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-0.087890625,
0.... | 28,878 | 28878 | |
Homework Help
Posted by Kayla on Monday, January 15, 2007 at 7:05pm.
6-x=2x+9
If you are to solve the equation for x, first try to get the variable on one side of the equation.
Let's subtract 2x from both sides to start (whatever operation you do to one side of an equation you must do to the other side as well):
6 ... | 4 | [
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Hyperfine Structure
Next: The Zeeman Effect Up: Smaller Effects Previous: The Lamb Shift
To this point, the nucleus has been assumed to interact with the electron only through its electric field. However, like the electron, the proton has spin angular momentum with s=1/2, and associated
with this angular momentum ... | 4 | [
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Calculus slope intersection
September 1st 2009, 03:48 PM
pantera
Calculus slope intersection
Can someone show me how to find the points that intersect with the graph of the function f(x) = 1-x^2 and the tangent line that goes through the point (2,0).
September 1st 2009, 04:01 PM
luobo
Quote:
The poi... | 4 | [
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0.0322265625,
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-0.058349609375,
0.04150390625,
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-0.116699... | 28,881 | 28881 | |
math, correction
Posted by Jasmine20 on Sunday, January 28, 2007 at 2:15am.
bobpursley. i'm still questioning the problem states find the slope of any line perpendicualr to the line through points (3,3) and (2,8).
y= (8-3)/(2-3)
the slope i get is.
(5)/(-1) for the first slope now to get any line perpendicular to t... | 4 | [
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normal component of accelleration
September 22nd 2010, 10:57 PM
heatly
normal component of accelleration
Iam having issues with this one iff anybody can help?
Given y^2=3x^3+8x
where x and y are in meters and y is positive,what is the normal component of the accelleration when x=2m,x=3m/s and x=7m/s^2.
... | 4 | [
-0.0177001953125,
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0.0172119140625,
0.00396728515625,
-0.037353515625... | 28,883 | 28883 | |
please help sin cos
sqrt 2sinx + sin2x=0 for all values of x. Thank you.
I'll assume that was meant to say 'solve' for all values of x. We have $\sqrt{2}\sin{x}+\sin{2x} = 0 \Rightarrow \sqrt{2}\sin{x}+2\cos{x}\sin{x} = 0 \Rightarrow \sin{x}\left(\sqrt{2}+2\cos{x}\right)
= 0$. Thus either $\sin{x} = 0$ or $2\cos{x} = ... | 4 | [
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Limit problem (what's going wrong?)
June 16th 2013, 12:17 AM #1
Newbie
Joined
May 2013
From
Hong Kong, NOT China
Posts
5
Limit problem (what's going wrong?)
${\lim _{x \to - \infty }}{\frac{4x}{\sqrt{x^{2}+4x}+x}}}$
This gives $- \infty$, which is correct.
Dividing both the numerator and th... | 5 | [
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About pdf
October 2nd 2011, 03:29 AM #1
Newbie
Joined
Oct 2011
Posts
8
About pdf
Hello. There are 3 boys, 3 pictures and 3 car names.
A task is just to connect car names into their pictures.
If a boy connects car names into pictures randomly, what is a probability function
on number Y of corr... | 5 | [
-0.0166015625,
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... | 28,886 | 28886 | |
the encyclopedic entry of broadening
In atomic physics, Doppler broadening is the broadening of spectral lines due to the Doppler effect in which the thermal movement of atoms or molecules shifts the apparent frequency of each emitter.
The many different velocities of the emitting gas result in many small shifts, the c... | 4 | [
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0.125,
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0.0341796875,
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Posts about expected points on Code and Football
July 3, 2013
Adjusted yards per attempt 101: thinking in terms of a simple scoring model.
Posted by foodnearsnellville under Data, Football, Statistics | Tags: adjusted yards per attempt, expected points, Pro Football Reference, scoring model, scoring models, The Hidde... | 4 | [
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0.00830078125,
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... | 28,888 | 28888 | |
L'Hopital's Rule 0/0 with an integral in the numerator
March 24th 2008, 04:05 PM #1
Member
Joined
Mar 2008
Posts
78
L'Hopital's Rule 0/0 with an integral in the numerator
Find the limit as x approaches 0 of the integral of (1+sint)^(1/2)dt from 0 to x, divided by x. (x is in the denominator)
This is... | 5 | [
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0.01806640625,
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-0.0537109... | 28,889 | 28889 | |
Group Classification of a Generalized Lane-Emden System
Journal of Applied Mathematics
Volume 2013 (2013), Article ID 305032, 12 pages
http://dx.doi.org/10.1155/2013/305032
Research Article
Group Classification of a Generalized Lane-Emden System
^1Department of Mathematical Sciences, International Institute for Symm... | 4 | [
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-0.0028991... | 28,890 | 28890 | |
Get homework help at HomeworkMarket.com
Question
Submitted by
Clay1203
on Fri, 2012-06-08 17:48
due on Fri, 2012-06-15 19:59
answered 2 time(s)
Clay1203 is willing to pay $5.00
3 anonymous students showed interest
Problem 1: R Chart and X-bar Chart
Thermostats are subjected to rigorous testing before they are ... | 5 | [
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How many combinations..?
May 2nd 2008, 08:23 AM #1
Newbie
Joined
May 2008
Posts
3
How many combinations..?
Hi!
i am having this difficulty at the moment. My Dad has forgotten the combination to his bicycle lock... he knows (believes) it is a combination of 44670. We have tried the more obvious ones ... | 4 | [
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the encyclopedic entry of power factor
The
power factor
of an
AC
electric power system is defined as the
ratio
of the
real power
to the
apparent power
, and is a number between 0 and 1 (frequently expressed as a percentage, e.g. 0.5 pf = 50% pf). Real
power
is the capacity of the circuit for performing work... | 4 | [
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0.00915527343... | 28,893 | 28893 | |
sample size
May 8th 2008, 01:07 AM #1
Newbie
Joined
Aug 2007
Posts
19
sample size
I just got a strange result...
1. I have the standard deviation = 200
2. I know the mean of the sample is at most 100 more than the mean of the population.
I must find the size of the sample with 95% confidenc... | 4 | [
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-0.0... | 28,894 | 28894 | |
How do I extract j from, B = A.(1 + j)^N + (P/j).[(1 + j)^N - 1]?
I think it can be useful to use a math program to calculate that for you.
i don't have any. i tried online using wolframaplha but it didn't help...it's really difficult to extract j..
Last edited by fallingleaves75; August 20th 2011 at 12:47 AM.
This... | 4 | [
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0.06... | 28,895 | 28895 | |
Suprema question
January 2nd 2011, 09:54 AM #1
Member
Joined
Dec 2010
Posts
107
Suprema question
Let S,T be non-empty bounded subsets of the real numbers. Prove that $S \cup T$ is bounded above.
How would you start this question?
If $s\geq 0,\;t\geq 0$ are upper bounds for $S$ and $T$ respec... | 4 | [
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Approximation of Common Fixed Points of a Sequence of Nearly Nonexpansive Mappings and Solutions of Variational Inequality Problems
Journal of Applied Mathematics
Volume 2012 (2012), Article ID 902437, 12 pages
http://dx.doi.org/10.1155/2012/902437
Research Article
Approximation of Common Fixed Points of a Sequence o... | 5 | [
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Multiplying and Dividing Polynomials?
Simplifying? I got the answer $36c^4b^6a^2$for the problem $(-2ab^5)(-6abc)(3c^3)$.Could you show me how you would solve these expressions? $(-3a^2b^2+7)(-6ab+2)$ $(x+3)(2x^2+7x+1)$
Last edited by deekay930; December 16th 2009 at 05:19 PM.
To simplify the expression $(-3a^2b^2 + ... | 4 | [
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... | 28,898 | 28898 | |
Partial differential equation with variable BC and IC
August 22nd 2013, 09:13 AM
berni1984
Partial differential equation with variable BC and IC
Hello everyone!
I have a problem with a PDE that I have to solve.
I need to solve the heat equation (2nd order PDE) with respect to time and distance in a reg... | 4 | [
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... | 28,899 | 28899 |