content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
A Jacobi-Collocation Method for Second Kind Volterra Integral Equations with a Smooth Kernel
Abstract and Applied Analysis
Volume 2014 (2014), Article ID 913691, 10 pages
http://dx.doi.org/10.1155/2014/913691
Research Article
A Jacobi-Collocation Method for Second Kind Volterra Integral Equations with a Smooth Kernel... | 5 | [
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0... | 27,200 | 27200 | |
Another Optimization Question
June 13th 2008, 09:05 PM #1
Newbie
Joined
Mar 2008
Posts
6
Another Optimization Question
hello, I posted an optimization question earlier and I got another one that I am struggling with. It states:
A floodlight that is 15 m away and at ground level illuminates a buildin... | 4 | [
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0.0698242187... | 27,201 | 27201 | |
Math Help
February 18th 2010, 10:43 AM #1
Newbie
Joined
Jan 2010
Posts
12
Integral
Hi,
I am trying to solve ∫ln(t)^2 dt. I already solved part of the integral, however I don't know how to complete the exercise. Can someone help me? Thanks.
∫ln(t)^2 dt
u=ln(t)^2 dv=dt
du=2ln(t)*(1/t)dt v... | 5 | [
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0.06884765625,
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0.01904296875,
-0.0556640625,
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Optimization Problems
I need an example or more of optimation problems - finding maximum values. Thanks
wow, choose your own question I'll make an easy one then. Find the maximum of $y=-(x-1)^2 + 15$ Firstly, this is a familiar graph (upside down parabola, shifted around). The maximum value of y will
be 15, occuring a... | 4 | [
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... | 27,203 | 27203 | |
How to find the radius from the surface area of a cylinder?
June 6th 2009, 03:01 PM #1
Newbie
Joined
Apr 2009
Posts
2
How to find the radius from the surface area of a cylinder?
Hi. In my math class im learning about volume and surface area of a cylinder. There was one question on my homework that got me... | 4 | [
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... | 27,204 | 27204 | |
Variety of questions...
June 2nd 2007, 04:04 PM #1
Junior Member
Joined
May 2007
Posts
56
Variety of questions...
Hey, i really need help with some kinds of questions and appreciate greatly any help I can get! I got a real GCSE test coming up on Monday! (I live in the UK...) Thanks
Q1: Below is a ro... | 4 | [
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... | 27,205 | 27205 | |
Benchmarks Game/Parallel/Mandelbrot
From HaskellWiki
< Benchmarks Game | Parallel
(Difference between revisions)
m m
← Older edit
(One intermediate revision by one user not shown)
Line 28: Line 28:
Runtime: Runtime:
− ./mand3 6400 + ./mand3 6400 ... | 4 | [
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... | 27,206 | 27206 | |
What is the value of integer x ?
Author Message
TAGS:
What is the value of integer x ? [#permalink] 20 Apr 2010, 06:04
3
... | 4 | [
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Partial-Fraction Decomposition: General Techniques
Partial-Fraction Decomposition:
General Techniques (page 1 of 3)
Sections: General techniques, How to handle repeated and irreducible factors, Examples
Previously, you... | 4 | [
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0.1... | 27,208 | 27208 | |
[SOLVED] Find sum of infinite series?
April 23rd 2009, 05:34 AM #1
[SOLVED] Find sum of infinite series?
Find the sum of the following infinite series:
∑(n = 0 to ∞) (1/n![∑(k = 0 to n) ((k+1).∫(from 0 to 1) 2^(-(k +1)x) dx]8)
Is it something to do with binomial or A.P/G.P/H.P? I cannot make head or tai... | 5 | [
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-0.00677490234375,
0.032958984375,
-0... | 27,209 | 27209 | |
Finite Fields
February 10th 2009, 06:42 AM #1
Junior Member
Joined
Oct 2008
From
Green Bay
Posts
30
Finite Fields
I need a little help im close but stuck.
1. Is there a field with 25 elements?
Well I know that |V_F|=p^n, where p is a prime. Then |V_F|=p^n=25=5^2, p=5, n=2. So now I have to ... | 4 | [
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Combinations?
May 29th 2009, 07:53 PM #1
Combinations?
If X is a set containing n elements and Y is a set containing m elements, how many functions are there from X to Y? How many of these functions are one-to-one?
For every element in X, I just need to associate an element of Y(for which I have m choices). ... | 4 | [
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0.1630859375,
0.0150146484375,
-0.... | 27,211 | 27211 | |
Change of variable triple integral question.
December 15th 2011, 11:42 AM
Kuma
Change of variable triple integral question.
Question asks:
Find the volume of the solid bounded by: z = 4x^2 + y^2 and the cylinder y^2+z=2
In the solution they used change of variable by putting in x = r cosθ/sqrt 2 and
... | 5 | [
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Recursive Feature Selection with Significant Variables of Support Vectors
Computational and Mathematical Methods in Medicine
Volume 2012 (2012), Article ID 712542, 12 pages
http://dx.doi.org/10.1155/2012/712542
Research Article
Recursive Feature Selection with Significant Variables of Support Vectors
^1Department of... | 4 | [
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-0.0654296875,
-... | 27,213 | 27213 | |
solving systems of equations
solve the following for u and t x= u + t^2 y = t - u^2
I tried this and was just left with y + x^2 = t +2xt^2 - t^4 ... not sure how to simplify this I just end up going in circles with all the substitution.
you are right what you are doing. after you simplfy you get: $y=t-x^2+2t^2x-t^4$ ... | 5 | [
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-... | 27,214 | 27214 | |
Fibonacci number
February 27th 2010, 10:46 PM #1
Member
Joined
Aug 2008
Posts
172
Fibonacci number
For $n \in N$ let $f_n$ be the $n^{th}$ Fibonacci number :
$f_1 = 1 \ , f_2 =1 , f_n= f_{n-1}+ f_{n-2} , n \geq 3 .$
Prove that :
$f_n \ is \ even \iff 3 \ divides \ n$
According to...
... | 5 | [
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-0.0595703125,
-0.0... | 27,215 | 27215 | |
[SOLVED] Conditional Expectation- Point me in right direction
April 13th 2009, 05:35 PM #1
Junior Member
Joined
Apr 2009
Posts
70
[SOLVED] Conditional Expectation- Point me in right direction
I am having trouble getting started in the right direction with the following problem:
Random variable X~U[0... | 5 | [
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0.0021820068359375,
-0.085937... | 27,216 | 27216 | |
Big-Oh algorithm Proof
August 11th 2010, 05:03 PM #1
Newbie
Joined
Aug 2009
Posts
16
Big-Oh algorithm Proof
Hello everyone! I'm doing a stage 2 Algorithms paper and I've done most of these running time questions. However I'm stuck with doing a proof, and proofs just fly over my head. If someone could
... | 4 | [
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0.07470703125,
0.0045471191406... | 27,217 | 27217 | |
Modeling Laterally Loaded Single Piles Accounting for Nonlinear Soil-Pile Interactions
Journal of Engineering
Volume 2013 (2013), Article ID 243179, 7 pages
http://dx.doi.org/10.1155/2013/243179
Research Article
Modeling Laterally Loaded Single Piles Accounting for Nonlinear Soil-Pile Interactions
^1Zachry Departmen... | 4 | [
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0.0103759765625,... | 27,218 | 27218 | |
Two-way Analysis of Variance (ANOVA)
February 15, 2010
By Ralph
The analysis of variance (ANOVA) model can be extended from making a comparison between multiple groups to take into account additional factors in an experiment. The simplest extension is from
one-way to two-way ANOVA where a second factor is included i... | 5 | [
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a to the u integral
September 4th 2013, 06:03 PM
Jason76
a to the u integral
Does look right? http://www.freemathhelp.com/forum/im...s/confused.png As far as correct form, etc..?
$\int_{1}^{5} 3^{2x} dx$.
Using $\int a^{u} du = \dfrac{a^{u}}{\ln a} + C$ and $\dfrac{d}{dx} (a^{u}) = a^{u} * du * \ln a$.... | 5 | [
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continuous random variable help?
November 22nd 2009, 03:41 PM
Intsecxtanx
continuous random variable help?
The monthly profit of Company I can be modeled by a continuous random variable with density function f . Company II has a monthly profit that is twice that of Company I. Determine the
probability densi... | 5 | [
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99 questions/Solutions/84
From HaskellWiki
Create an undirected-graph:
graph = mkGraph False (1,5)
[(1,2,12),(1,3,34),(1,5,78),(2,4,55),
(2,5,32),(3,4,61),(3,5,44),(4,5,93)]
False means undirected
Use prim algorithm to find the minimal spanning tree:
prim graph
Output:
[(55,2... | 4 | [
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0.054931640625,
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0.07958984375,
0.013427734375,
-0.1298828125,
0.0240478515625,
0.006561279296875,
0.0208740234375,
0.05029296875,
-0.0301513671875,
-0.0162353515625,
0.107421875,
-0.046875,
-0.0... | 27,222 | 27222 | |
ers
Here's the actual published data for the same driver.
R[e] 6 Ω
L[e] 0.24 mH
... | 4 | [
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0.046875,
-0.0289306640625,
0.0289306... | 27,223 | 27223 | |
a question about differentiation
January 28th 2009, 07:24 AM #1
Junior Member
Joined
Jun 2008
Posts
53
a question about differentiation
P is a point 22m due east of a fixed point O and Q is a point 14m due south of O. A particle A starts at P and moves towards O at a speed of 4m/s while a particle B star... | 4 | [
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0.09375,
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0.040771484375,
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-... | 27,224 | 27224 | |
Numerical Approximation for Nonlinear Gas Dynamic Equation
International Journal of Partial Differential Equations
Volume 2013 (2013), Article ID 846749, 7 pages
http://dx.doi.org/10.1155/2013/846749
Research Article
Numerical Approximation for Nonlinear Gas Dynamic Equation
Department of Applied Mathematics, School... | 5 | [
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On a Periodic Solution of the 4-Body Problems
Advances in Mathematical Physics
Volume 2014 (2014), Article ID 478495, 3 pages
http://dx.doi.org/10.1155/2014/478495
Research Article
On a Periodic Solution of the 4-Body Problems
^1Mathematical College, Sichuan University, Chengdu, Sichuan 610064, China
^2School of Sci... | 5 | [
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A Mutual-Evaluation Genetic Algorithm for Numerical and Routing Optimization
Journal of Applied Mathematics
Volume 2013 (2013), Article ID 214814, 14 pages
http://dx.doi.org/10.1155/2013/214814
Research Article
A Mutual-Evaluation Genetic Algorithm for Numerical and Routing Optimization
Department of Information Man... | 4 | [
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-0.10205078125,
0.052490234375,
-0.0095825195... | 27,227 | 27227 | |
Stability Analysis of a Multigroup SEIR Epidemic Model with General Latency Distributions
Abstract and Applied Analysis
Volume 2014 (2014), Article ID 740256, 8 pages
http://dx.doi.org/10.1155/2014/740256
Research Article
Stability Analysis of a Multigroup SEIR Epidemic Model with General Latency Distributions
Schoo... | 5 | [
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Data Analysis -- Proportion Problem and Probability
April 23rd 2009, 03:28 PM #1
Junior Member
Joined
Feb 2008
From
NY/PA
Posts
53
Data Analysis -- Proportion Problem and Probability
According to a marketing research firm, 52% of all residential telephone numbers in Los Angeles are unlisted. A teleph... | 5 | [
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Limits review problem
February 9th 2010, 04:02 PM #1
Newbie
Joined
Feb 2010
Posts
7
Limits review problem
I'm not sure how to go about solving this problem. = \
Could someone please give me some suggestions as to how to begin.
"Find the equations of both lines that pass through (4,-10) and are ... | 4 | [
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-0.03466796875,
-0.00418090820312... | 27,230 | 27230 | |
Linear Transformations: please help!
May 26th 2010, 05:47 PM
tanelly
Linear Transformations: please help!
Let V and W be vector spaces. A function L, with domain V and range W us called a linear transformation from V to W iff
vectors denoted by bold
i) for every m and n in V, L(m+n)=L(m) + L(n)
ii)... | 4 | [
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Patent US4908781 - Computing device for calculating energy and pairwise central forces of particle interactions
BACKGROUND OF THE INVENTION
This invention was made with government support under Grant Number NIH lP41-RR02554 from the National Institute of Health and NSF PCM 84-02496 from the National Science Foundation... | 4 | [
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Why is this another way of writing the formula for the tangent line?
March 18th 2013, 08:12 PM #1
Why is this another way of writing the formula for the tangent line?
We’re starting a new unit: applications of differentiation.
We’re going to do two applicationstoday. The firstislinear approximations,
which ... | 4 | [
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Lagrange Multipliers
December 6th 2010, 11:02 PM
tintin2006
Lagrange Multipliers
Find the dimensions of the closed right circular cylindrical can of smallest surface area whose volume is $16pi\;cm^3$.
I managed to find r = 2cm, h = 4cm which gives the surface area of $24pi \,cm^2$ using the method $abla f=\l... | 5 | [
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Re-arranging and solving for q
35q^(-3/5)=-21q^(-8/5)-((-21q^8/5)*35q^(-3/5)) Re-arrange and solve for q. I did it but got some mad answer.
Hello, Let's put it all in one side : $35q^{-3/5}+21q^{-8/5}+({\color{red}(-21q^{8/5})*35q^{-3/5}})=0$ Look at the red thing $-21q^{8/5}*35q^{-3/5}=-(21*35)q^{8/5-3/5}=-21*35 q^1=... | 4 | [
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-0.0476... | 27,235 | 27235 | |
A Rotor Flux and Speed Observer for Sensorless Single-Phase Induction Motor Applications
International Journal of Rotating Machinery
Volume 2012 (2012), Article ID 276906, 13 pages
http://dx.doi.org/10.1155/2012/276906
Research Article
A Rotor Flux and Speed Observer for Sensorless Single-Phase Induction Motor Applic... | 4 | [
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0.07275390625,
-0.031127... | 27,236 | 27236 | |
Show f(x) is injective
October 29th 2008, 05:31 PM #1
Senior Member
Joined
Apr 2008
From
Vermont
Posts
318
Show f(x) is injective
I want to show f(x) =x/(x+2) is injective.
I know I need to assume a is not equal to a' but f(a)=f(a') and find contradiction.
Here is my start:
Assume a not ... | 4 | [
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0.0203... | 27,237 | 27237 | |
A Danger-Theory-Based Immune Network Optimization Algorithm
The Scientific World Journal
Volume 2013 (2013), Article ID 810320, 13 pages
http://dx.doi.org/10.1155/2013/810320
Research Article
A Danger-Theory-Based Immune Network Optimization Algorithm
^1College of Computer Science, Sichuan University, Chengdu 610065... | 4 | [
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Feature Extraction from 3D Point Cloud Data Based on Discrete Curves
Mathematical Problems in Engineering
Volume 2013 (2013), Article ID 290740, 19 pages
http://dx.doi.org/10.1155/2013/290740
Research Article
Feature Extraction from 3D Point Cloud Data Based on Discrete Curves
School of Control Science and Engineeri... | 4 | [
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Derive equation of runner
September 19th 2010, 11:10 AM #1
Junior Member
Joined
Aug 2010
Posts
32
Derive equation of runner
Hi,
An athlete usually runs 80km at a steady speed of $v$km per hour. He decides to reduce his speed by 2.5km per hour resulting in his run taking an extra 2 hours and 40 minut... | 4 | [
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0.09326171875,
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Math Help
September 4th 2007, 09:17 PM #1
Member
Joined
Sep 2006
Posts
221
Diff EQ
Two questions; the first is more of a check with some minor help:
1.) From calculus, what function(s) do you know where its 2nd deriv. is itself? What function(s) do you know where its 2nd deriv. is the negative of i... | 5 | [
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-0.0172119140625,... | 27,241 | 27241 | |
C
Announcement
CORRELATION COEFFICIENTS
We've discussed how to summarize a single variable. The next question is how to summarize a pair of variables measured on the same observational unit--(percent of calories from saturated fat,... | 4 | [
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0.00842285156... | 27,242 | 27242 | |
Minimum Distance
October 18th 2009, 11:01 AM
billym
Minimum Distance
Can somebody tell me if I've started this off right?
I need to use the Lagrange method to find the minimum distance from the point (1,2,3) to any point of the surface: $x + 2y - z = 2$
Let: $D^2=f(x,y,z)=(x-1)^2+(y-2)^2+(z-3)^2$
... | 5 | [
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0.00897216796875,
-... | 27,243 | 27243 | |
Vector Real Life Application
August 12th 2011, 06:18 AM #1
Junior Member
Joined
Jul 2011
Posts
34
Vector Real Life Application
So, I can't solve this problem, I've tried for about 30 minutes...
I'm trying to set up a right triangle with the vectors and using the tip to tail method, but I'm not gettin... | 4 | [
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... | 27,244 | 27244 | |
Abelian Group
October 24th 2011, 03:48 AM #1
Newbie
Joined
Sep 2011
Posts
21
Abelian Group
Let H and K be subgroup of an abelian group G (not neccessarily finite). Suppose order of H and K are a and b respectively. Prove that there exists a subgroup with order L, where L = lcm(a,b).
I tried to use t... | 4 | [
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-0.054443359375,
0.023803... | 27,245 | 27245 | |
Are these functions injective/surjective etc?
October 25th 2012, 10:34 AM #1
Newbie
Joined
Oct 2012
From
aberdeen
Posts
22
1. Let f : R -> R be the function given by f(x) = x^3 - x^2 - 2x.
(a) The function f is injective.
(b) The function f is surjective.
(c) f^-1({0}) = {0}
(d) -1 ∈ f... | 5 | [
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-Conjugate Generalized Procrustes Problem
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 423605, 9 pages
http://dx.doi.org/10.1155/2013/423605
Research Article
The Hermitian -Conjugate Generalized Procrustes Problem
^1Department of Applied Mathematics, Shanghai Finance University, Shanghai 201209, Chin... | 5 | [
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-0.0520019531... | 27,247 | 27247 | |
Complex Function Differentiability
August 1st 2011, 05:24 AM #1
Junior Member
Joined
Apr 2010
Posts
56
Complex Function Differentiability
First off, sorry if this is in the wrong section it could be in calculus I guess, but my unit is titled complex analysis so I thought it might go in here.
So I ha... | 5 | [
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-0.0727539062... | 27,248 | 27248 | |
Where does the Poincaré metric come from?
March 23rd 2012, 12:15 PM #1
Newbie
Joined
Aug 2010
Posts
6
Where does the Poincaré metric come from?
According to Poincaré disk model - Wikipedia, the free encyclopedia the transformation map $\vec{w} = \left(\begin{array}{c} x_1 \\ x_2 \end{array} \right)$ from... | 4 | [
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0.022094... | 27,249 | 27249 | |
Lost on Question 18...What am I doing wrong???
August 22nd 2009, 02:56 PM
Nimmy
Lost on Question 18...What am I doing wrong???
Example: The conical tank from y = 2x is filled to within 2 ft of the top with the olive oil weighing 57 lb/ft^3. How much work does it take to pump the oil to the rim of the tank.
... | 5 | [
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-0.042724609375... | 27,250 | 27250 | |
motion in one-d
May 30th 2010, 02:11 PM
jiboom
motion in one-d
ball thrown up with v=10m/s from a building of height 100. find max height and time taken to reach this max.
i said $a=-g$
integrate to get $v=-gt+C$ but initially v=10 so $v=-gt+10$
at max height v=0 so t=10/g
now i integrate agai... | 4 | [
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0.0595703125,
-0.0... | 27,251 | 27251 | |
Integral under a closed curve
April 24th 2009, 01:49 AM #1
Integral under a closed curve
Let H be the curve parameterised by $\underline{r}(t):=(sin ~t, cos~t, sin~2t), \ 0 \leq t \leq \pi$, and let L be the horizontal line from $(0,-1,0)$ to $(0,1,0)$.
Let $\underline{v}$ be the vector field $\underline{v}(... | 5 | [
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-0.004... | 27,252 | 27252 | |
Find Combined Cost
April 20th 2009, 09:14 PM #1
MHF Contributor
Joined
Jul 2008
From
NYC
Posts
1,489
Find Combined Cost
Three shirts and 2 neckties cost $69. At the same prices, 2 shirts and 3 neckties cost $61. What is the combined cost of one shirt and one necktie?
I realize this is a system o... | 4 | [
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-0.0498046875,
-0.06884765625,
0.033691... | 27,253 | 27253 | |
tanθ = -2, θ = ?
October 10th 2011, 01:11 PM
s3a
tanθ = -2, θ = ?
What is θ such that tanθ = -2, sinθ = 2/sqrt(5), and cosθ = -1/sqrt(5)?
I am doing a question which is not about trigonometry (but involves it in one step) and I do not know how to find theta without using a calculator. I basically want the e... | 4 | [
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-0.044677734375,
-0.05029296875... | 27,254 | 27254 | |
Summation of Euler's φ-Function
July 7th 2010, 11:45 AM #1
Junior Member
Joined
Jul 2010
From
NJ
Posts
68
Summation of Euler's φ-Function
Euler's φ-function measures the number of positive integers equal to or less than n,
which are relatively prime to n.
Compute the following:
∑ φ(d)
... | 5 | [
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0.0087890625,
0.00008344650268554688,
0.10595703125,
0.0184326171875,
0.046142578125,
-0.00013065338134765625,
0.0242919921875,
0.064453125,
0.037109375,
-0.0751953125,
-0.033935546875,
0.060546875,
-0.03125,
-0.0024261... | 27,255 | 27255 | |
Indefinite integrals and Differentiate
1) $<br /> \frac{1}{4} = 2^ {-2}<br />$ $<br /> 16 = 2^4<br />$ so $2^{-2x} * 2^{\frac{4x}{2}}$ $<br /> =2^{2x-2x} =1 <br />$
b) If secod question is $log_2 {x} + 5log_2{x} +\frac{1}{2}log_2{(x-1)}$ than $=log_2 {x} + log_2{(x+1)^5} +log_2{(x-1)^\frac{1}{2}}$ $<br /> =log_2 {[x(x... | 5 | [
0.05322265625,
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0.0196533203125,
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-0.00799560546875,
-0.0277099609375,
0.0595703125,
-0.000743865966796875,
-0.0... | 27,256 | 27256 | |
Permutations.. a quick question
How exactly do i go about solving these questions:an example would be fine
Example: $<br /> \frac{{n!}}{{\left( {n - 1} \right)!}} = \frac{{n\left( {n - 1} \right)!}}{{\left( {n - 1} \right)!}} = n<br />$
you dont have to use one of my questions but can u do an example with numbers? id... | 4 | [
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0.0072021484375,
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0.0654296875,
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0.0167... | 27,257 | 27257 | |
Convert complex number to polar form?
November 24th 2011, 12:58 PM #1
Newbie
Joined
Oct 2011
Posts
4
Convert complex number to polar form?
Well, I need help converting 1/(1+j*w*c*r) to polar form, where j is the complex number sqrt(-1) and w,c,r are just variables. Can't split up the denominator to make ... | 5 | [
-0.10205078125,
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0.05517578125,
0.1552734375,
-0.0208740234375,
0.0062255859375,
-0.047363281... | 27,258 | 27258 | |
Big Data Analytics in R – the tORCH has been lit!
May 22, 2013
By mhornick
This guest post from Anand Srinivasan compares performance of the Oracle R Connector for Hadoop with the R {parallel} package for covariance matrix computation, sampling, and parallel linear model
fitting.
Oracle R Connector for Hadoop (ORCH... | 5 | [
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0.0007858... | 27,259 | 27259 | |
Stability Switches and Hopf Bifurcation in a Kaleckian Model of Business Cycle
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 689372, 8 pages
http://dx.doi.org/10.1155/2013/689372
Research Article
Stability Switches and Hopf Bifurcation in a Kaleckian Model of Business Cycle
^1Department of Economics, ... | 5 | [
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-0.11767578125,
... | 27,260 | 27260 | |
A Predator-Prey Model in the Chemostat with Time Delay
International Journal of Differential Equations
Volume 2010 (2010), Article ID 287969, 41 pages
http://dx.doi.org/10.1155/2010/287969
Research Article
A Predator-Prey Model in the Chemostat with Time Delay
^1Department of Mathematics and Statistics, McMaster Uni... | 5 | [
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0.0390625,
-0.00787353515625,
-0.... | 27,261 | 27261 | |
long division using the remainder theorem
November 21st 2005, 11:06 AM #1
Newbie
Joined
Sep 2005
Posts
11
we have just learnt this topic but i dont understand how i would do this:
2x^4 + 3x^3 – 2x^2 + 4x – 6
divided by
x^2 + x – 2
using the remainder theorem
(aka in the form (Ax^2 ... | 4 | [
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0.0240478... | 27,262 | 27262 | |
R Tutorial Series: Two-Way ANOVA with Unequal Sample Sizes
February 28, 2011
By John Quick
When the sample sizes within the levels of our independent variables are not equal, we have to handle our ANOVA differently than in the typical two-way case. This tutorial will demonstrate how to
conduct a two-way ANOVA in R w... | 5 | [
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Initial value problem
February 4th 2010, 02:04 PM #1
Newbie
Joined
Jan 2010
Posts
7
Initial value problem
I'm so close to the answer, I've narrowed it down to two possibilites, here is the question:
Find the initial value problem:
$cos(x)dy/dx-ysin(x)=xcos(x)$
Here are my two answers, only... | 5 | [
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0.07080078125,
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0.0439453125,
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-0... | 27,264 | 27264 | |
Corollary from the Exact Expression for Enthalpy of Vaporization
Journal of Thermodynamics
Volume 2011 (2011), Article ID 945047, 7 pages
http://dx.doi.org/10.1155/2011/945047
Research Article
Corollary from the Exact Expression for Enthalpy of Vaporization
Department of Physics and Chemistry of New Materials, A. M.... | 4 | [
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0.10009765625... | 27,265 | 27265 | |
Contraction mapping theorem
November 28th 2010, 05:57 PM #1
Senior Member
Joined
Apr 2008
From
Vermont
Posts
318
Contraction mapping theorem
0<c<1 and |f(x)-f(y)<c|c-y|
a) Show f is continuous on all of R
b)Pick some point y1 in R and construct the sequence (y1,f(y1),f(f(y1)),....)
In gen... | 5 | [
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0.01806640625,
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elasticity of demand
November 9th 2010, 04:26 PM
lilwayne
elasticity of demand
The demand equation for a certain product is given by p =18e^−0.002q ,
where p is
the price in dollars and q is the quantity in units.
a) Find the elasticity of demand when 1000 units are produced.
b) Interpret you... | 5 | [
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-0.026489257... | 27,267 | 27267 | |
solve for x, includes fractions of x and exponents
April 16th 2010, 10:18 AM #1
Newbie
Joined
Apr 2010
Posts
1
solve for x, includes fractions of x and exponents
Solve for x:
[x/1.06]+[0.8x/1.06^2]+[0.64x/1.06^3]=28370
I know the final answer should be x=12940 but can anyone explain step by ste... | 4 | [
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-... | 27,268 | 27268 | |
Real Valued Lebesgue Intergal
March 9th 2012, 10:03 PM #1
Member
Joined
Oct 2009
Posts
128
Real Valued Lebesgue Intergal
Hello!
I'm trying to show that if f is a measurable function on some space X, and if
$\int{fd\mu} < \infty$
then $\mu\{x \in X : f(x) = \infty\} = 0$
In other words... | 4 | [
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0.07177734375,
0.023193359375,... | 27,269 | 27269 | |
First order non-linear ODE
October 16th 2012, 03:22 PM #1
Newbie
Joined
Oct 2012
From
Canada
Posts
3
First order non-linear ODE
Hi everyone,
x^2y'-20+x^2y^2=0; y(1)=1
The question asks me to use substitution
y=1/u*du/dx to solve
So far I have
y'=-1/u^2*du/dx+1/u*d^2u/dx^2
... | 5 | [
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0.1015625,
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0.07861328125,
-0.025390625,
0.06640625,
-0.01556396484375,
-0.01348876953... | 27,270 | 27270 | |
Prediction Control for Brachytherapy Robotic System
Journal of Robotics
Volume 2010 (2010), Article ID 581840, 10 pages
http://dx.doi.org/10.1155/2010/581840
Research Article
Prediction Control for Brachytherapy Robotic System
Medical Physics Division, Department of Radiation Oncology, Thomas Jefferson University, P... | 4 | [
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0.02197265625,
-... | 27,271 | 27271 | |
Linear problem
How would I express in standard form: contains point (-1,4) and is parallel to x-5y=5?
I think you are looking for the line that is parallel to $x-5y=5$ that contains the point $(-1,4)$ ? Haivng a play with this guy gives. $x-5y=5$ $-5y=5-x$ $y=\frac{5}{-5}-\frac{x}{-5}$ has the
gradient $m= \frac{1}{5}... | 4 | [
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0.01904296875,
... | 27,272 | 27272 | |
the encyclopedic entry of symmetric group
In mathematics, the symmetric group on a set X, denoted by S[X] or Sym(X), is the group whose underlying set is the set of all bijective functions from X to X, in which the group operation is that of
composition of functions, i.e., two such functions f and g can be composed to ... | 4 | [
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0.0007781982421875,
0.02697753... | 27,273 | 27273 | |
Performance Analysis of MIMO-STBC Systems with Higher Coding Rate Using Adaptive Semiblind Channel Estimation Scheme
The Scientific World Journal
Volume 2014 (2014), Article ID 304901, 17 pages
http://dx.doi.org/10.1155/2014/304901
Research Article
Performance Analysis of MIMO-STBC Systems with Higher Coding Rate Usi... | 4 | [
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-0.03... | 27,274 | 27274 | |
Logarithms Question
October 25th 2007, 11:41 PM #1
Junior Member
Joined
Oct 2007
Posts
56
Can anyone please help me in doing the following question:
Given that x^2 + y^2 = 6xy, find an equivalent expression to 2 log(x+y).
Thanks any help will be greatly appreciated.
Given that x^2 + y^2 = 6... | 4 | [
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0.047119140625,
0.09326171875,
-0.1513671875,
0.072... | 27,275 | 27275 | |
First order differential equation
May 21st 2012, 10:51 AM #1
Newbie
Joined
May 2012
From
Sweden
Posts
10
First order differential equation
find the solution that fulfills
please take me through the steps cause i dont know where to start all i can see is that it is separable and i didnt ge... | 5 | [
-0.0751953125,
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0.0546875,
-0.025390625,
-0.07080078125,
0.0214... | 27,276 | 27276 | |
Rational Function Integration
Doing this on Mathematica shows the answer has three separate terms which makes me think that partial fractions will be involved. I would try factoring the denominator and see where that leads.
Start with partial fractions. The denominator factors to: $(x-1)(x^2-2x+10)$. Thus you have $\f... | 5 | [
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0.07421875,
-0.0084228515625,
0.0260009765625,
0.0235595703125,
0.07... | 27,277 | 27277 | |
algebraic transformations
September 8th 2010, 12:35 PM
daniel123
algebraic transformations
Can anyone help me with these equations.
1.
make T the subject of the logarithmic relationship
M= V In T
2.
the following formula occurs in thermodynamics
Q= R0 In (V2/V1)
Transform to make V2... | 5 | [
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-0.08935546875,
... | 27,278 | 27278 | |
Velocities of curves.
March 11th 2009, 07:32 AM #1
Junior Member
Joined
Jan 2009
Posts
36
Velocities of curves.
Calculate the velocities v1,v2 of alpha1, alpha2 respectively at p = (1,0,0).
alpha1 = (-Pi, Pi) -> Reals(3), defined by alpha1(t) = (cost,sint,t)
alpha2 = (-Pi, Pi) -> R(Reals)(3), d... | 5 | [
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0.030517578125,
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-0.043212890625,
-0.08251953125,
-0.00695... | 27,279 | 27279 | |
McNemar’s Test
McNemar’s Test is a matched pair test used to determine whether there is a significant change in nominal data before and after an event. We begin with an example.
Example 1: In the BBC program The Doha Debates 100 people were surveyed regarding their opinion about capital punishment. 30 were in favor a... | 5 | [
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0.024658203125,
0.01519775390625,
-0.055... | 27,280 | 27280 | |
Derivative, critical points...
October 7th 2008, 08:40 PM #1
Newbie
Joined
Oct 2008
Posts
7
I have a polynomial -x^4/ 4-x^3/3+3 x^2 -11
Which I think I have found the correct derivative to.....-x^3-x^2-6x...is this correct?
If so, how do I find the critical points for this derivative, and also h... | 4 | [
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0.06689453125,
-0.023681640625,
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-0.02197265625,
0.0549316406... | 27,281 | 27281 | |
Generating a particular sequnce of numbers
7 Answers
Edited by
Azzi Abdelmalek
on 27 Jul 2013
Accepted answer
d=4
cell2mat(arrayfun(@(x) x:-1:1,1:d,'un',0))
7 Comments
Show 4 older comments
Adi gahlawat, you can not compare by puting df=3, look at this:
df=1000;
tic
for k=1:500
A1=cell2mat(arrayfun(@(x) x:-1:1... | 5 | [
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0.0400390625,
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-0.0206298828125,
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0.0177001953125,
-0.011... | 27,282 | 27282 | |
Asymptotic Solution for a Water Quality Model in a Uniform Stream
International Journal of Engineering Mathematics
Volume 2013 (2013), Article ID 135140, 4 pages
http://dx.doi.org/10.1155/2013/135140
Research Article
Asymptotic Solution for a Water Quality Model in a Uniform Stream
^1Department of Mathematics, Edwar... | 5 | [
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Help Simplifying Trig Identities
March 15th 2009, 07:33 AM #1
Newbie
Joined
Mar 2009
Posts
11
I need some help simplifying these identities...
#1 5(sec^2x - sin^2xsec^2x)
#2 sin(π/2 - x)(- secx)
and verifying this one...
#1 cscθ/cotθ + tanθ = cosθ
Hello, adam456006!
I need so... | 4 | [
-0.040283203125,
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0.051025390625,
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0.022705078125,
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0.06640625,
... | 27,284 | 27284 | |
2nd Order ODE
Any ideas how can I solve this equation f''=a*f^0.4? a=real number Thank you
I'm not certain on this but I did the following: $f''(x)=af(x)^{0.4}$ $\int f'(x)f''(x)dx=a \int f'(x)f(x)^{0.4}dx$ Dealing with each side of the equation individually: [IMG]http://latex.codecogs.com
/gif.latex?\displaystyle \be... | 5 | [
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0.006500244140625,
0.041748046875,
0.0252685546875,
-0.03198242187... | 27,285 | 27285 | |
Non-algebraizable Formal Scheme?
up vote 8 down vote favorite
7
What is an example of a formal scheme that is not algebraizable?
Recall that, if $X$ is a locally noetherian scheme and $Z$ is a closed subset (of the underlying topological space), then one can form the formal completion of $X$ along $Z$ which is someti... | 4 | [
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Area Problem
March 18th 2006, 12:15 PM #1
Member
Joined
Jan 2006
Posts
118
Area Problem
12. The area of the region enclosed by the graph of y = x^2 + 1 and the line y = 5 is
(A) 14/3
(B) 16/3
(C) 28/3
(D) 32/3
(E) 8p
frozenflames
12. The area of the region enclosed by the gr... | 5 | [
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Of Torus and Turk's-Head Knots...
Of Torus and Turk’s-Head Knots:
... | 4 | [
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0.... | 27,288 | 27288 | |
trapeze rule estimate error
May 4th 2010, 08:39 AM #1
Member
Joined
Feb 2008
Posts
184
trapeze rule estimate error
Consider the integral $I=\int_a^bf(x)dx$
(a) Write the expression of the trapezoidal rule of integration for approximating I.
$\int_{a}^{b} f(x)\, dx \approx (b-a)\frac{f(a) + f(b... | 4 | [
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-0.044... | 27,289 | 27289 | |
Volumes by the method of cross sections
July 11th 2009, 05:06 PM #1
Junior Member
Joined
Dec 2008
Posts
33
Volumes by the method of cross sections
An observatory is shaped like a solid whose base is a circular disk with diameter AB of length 2a. Find the volume of the solid if each cross section perpendi... | 5 | [
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-0.01031494140625... | 27,290 | 27290 | |
Integer basic proofs
July 20th 2007, 10:06 AM #1
Newbie
Joined
Jul 2007
Posts
19
Integer basic proofs
Hello,
Can anyone help me with any of the foolowing proofs
For any integers a,b,c,d
1. a | 0, 1 | a, a | a.
2. a | 1 if and only if a=+/-1.
3. If a | b and c | d, then ac | bd.
... | 4 | [
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RC
Most of us need to use existing parts to build up a good motor. I will use an example and step through the process and formulas to making an optimal motor. My example motor will be a
Scorpion 3008 Kit
Scorpion 3008 12N14P kit. I want an efficient 2200kv powerhouse from this motor. The formulas are not exact, but t... | 5 | [
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Direct Time Domain Numerical Analysis of Transient Behavior of a VLFS during Unsteady External Loads in Wave Condition
Abstract and Applied Analysis
Volume 2014 (2014), Article ID 628564, 17 pages
http://dx.doi.org/10.1155/2014/628564
Research Article
Direct Time Domain Numerical Analysis of Transient Behavior of a V... | 4 | [
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determine the functions for profit
January 28th 2007, 05:39 PM #1
Newbie
Joined
Jan 2007
Posts
2
determine the functions for profit
can you please help me with this one?
a company produces books for a cost of $15 each, and sells the books to bookstores for $40 each.for each one dollar increase in pri... | 5 | [
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0.024902... | 27,294 | 27294 | |
Should I read the rest of the book?
July 12th 2013, 02:37 PM #1
Newbie
Joined
Dec 2012
From
United States
Posts
22
Should I read the rest of the book?
"Deciding just how much of an outcome is due to skill and how much to luck is not a no-brainer. Random events often come like the raisins in a box of ... | 5 | [
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the encyclopedic entry of nu-calculus
In
theoretical computer science
, the
$pi$-calculus
is a
process calculus
originally developed by
Robin Milner
,
Joachim Parrow
and
David Walker
as a continuation of work on the process calculus CCS (
Calculus of Communicating Systems
). The aim of the
$pi$
-calculu... | 4 | [
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Natural log problem
November 13th 2012, 09:00 PM
~berserk
Natural log problem
Differentiate: h(t)= ln((t^2+1)/(t+1))
I'm having some trouble with this one. Not sure if I am doing too much work for it.
Also this one: y= x^x^2
Do I have to use logarithmic differentiaton for the second?
November 13t... | 5 | [
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... | 27,297 | 27297 | |
find expectation of this r.v.
March 17th 2013, 11:57 AM #1
Newbie
Joined
Mar 2013
From
NY
Posts
3
find expectation of this r.v.
toss balls one at a time into n bins, each ball will always land in one of the n bins.
stop tossing once some bin end up with 2 balls. and the tosses are independent of ... | 5 | [
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Coffee Coder
There are lots of things to get excited about HTML5 and the one which caught my curiosity was HTML5 Audio / Video API. I was overwhelmed with ideas of practical applications like face detect login or
inline dictation but I chose to start with something small – a whistle detector. Although, not wholly accur... | 4 | [
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-0... | 27,299 | 27299 |