content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
Volume by Slicing
January 23rd 2014, 02:22 PM #1
Member
Joined
Oct 2012
From
USA
Posts
187
Thanks
1
Volume by Slicing
The solid lies between planes perpendicular to the x axis at $x = 0$ and $x = 4$. The cross-sections perpendicular to the x axis on the interval $0 \leq x \leq 4$ are squares whos... | 5 | [
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An Improved Line Search Filter Method for the System of Nonlinear Equations
Journal of Applied Mathematics
Volume 2012 (2012), Article ID 273141, 15 pages
http://dx.doi.org/10.1155/2012/273141
Research Article
An Improved Line Search Filter Method for the System of Nonlinear Equations
^1Department of Mathematics, Sh... | 5 | [
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Internal Cumulants for Femtoscopy with Fixed Charged Multiplicity
Advances in High Energy Physics
Volume 2013 (2013), Article ID 230515, 22 pages
http://dx.doi.org/10.1155/2013/230515
Research Article
Internal Cumulants for Femtoscopy with Fixed Charged Multiplicity
^1Department of Physics, University of Stellenbosc... | 4 | [
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Spheres Solution
Since the balls have equal diameter and equal mass, their volume and density are also equal. However, the mass distribution is not equal, so they will have different moments of inertia - the hollow
sphere has its mass concentrated at the outer edge, so its moment of inertia will be greater than the sol... | 4 | [
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Green Disk Sizing
February 3, 2012
By Neil Gunther
I finally got around to completing
item 5 on my 2011 list
concerning electrical power consumed by a magnetic hard disk drive (HDD). The semi-empirical statement is:
Power ∝ N[platters] ×... | 5 | [
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sequences and series
March 31st 2009, 03:56 AM #1
Junior Member
Joined
May 2008
Posts
61
sequences and series
Different numbers x, y and z are the first three terms of a geometric progression with common ration r, and also the first, second and fourth terms of an arithmetic progression.
a)Find the v... | 4 | [
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... | 24,605 | 24605 | |
More Cauchy Sequences
October 26th 2008, 01:01 PM #1
Junior Member
Joined
Oct 2008
Posts
46
More Cauchy Sequences
If (Xsubn) and (Ysubn) are Cauchy Sequences, show that (Xsubn + Ysubn) and (Xsubn*Ysubn) are Cauchy Sequences. I am asked to prove this using the definition of a Cauchy Sequence only. Any hel... | 4 | [
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Having trouble with graph of trig. function
November 1st 2009, 11:05 AM #1
Member
Joined
May 2009
Posts
211
Having trouble with graph of trig. function
I'm doing a graph sketching of $f(x)=sin^4(x) + cos^4(x)$
And I'm having trouble with two things:
1)
I get $f''(x)=-4sin^4(x) -4cos^4(x) + 2... | 4 | [
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If f is a uniformly continuous function on a bounded set S, then f is a bounded on S
March 17th 2010, 05:32 PM #1
If f is a uniformly continuous function on a bounded set S, then f is a bounded on S
Here's my attempt:
Assume to the contrary that $f$ is a uniformly continuous function on a bounded set $S$ but... | 5 | [
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Quantum Electrodynamic Modeling of
Advances in Optical Technologies
Volume 2008 (2008), Article ID 615393, 11 pages
http://dx.doi.org/10.1155/2008/615393
Research Article
Quantum Electrodynamic Modeling of Silicon-Based Active Devices
Department of Electrical and Computer Engineering, University of Delaware, Newark... | 4 | [
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Quasisynchronization in Quorum Sensing Systems with Parameter Mismatches
Abstract and Applied Analysis
Volume 2014 (2014), Article ID 587019, 7 pages
http://dx.doi.org/10.1155/2014/587019
Research Article
Quasisynchronization in Quorum Sensing Systems with Parameter Mismatches
^1School of Science, Hangzhou Dianzi Un... | 4 | [
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Determinant proof/evaluation ?
August 13th 2010, 05:26 AM
Doktor_Faustus
Determinant proof/evaluation ?
Hi guys,
I'm trying to answer the following:
Prove the following identity without evaluating the determinants:
[PHP]
a + b c+d e+f a c e b d f
p q r = p q r + p q r
u v w u v w u v w... | 5 | [
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Implicit Line Finding?
June 14th 2009, 10:50 AM
VonNemo19
Implicit Line Finding?
Find the equation of the line(s) tangent to the curve $x^3+2xy-y^2=-2$ at the point(s) where $x=1$.
My answer is
$y=-\frac{3}{4}x+\frac{15}{4}$
and
$y=-\frac{5}{4}x+\frac{1}{4}$.
Is this correct?
June 14th ... | 5 | [
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Help please, few problems
October 30th 2007, 07:45 PM #1
Junior Member
Joined
Oct 2007
Posts
73
Help please, few problems
1.) 4k+2
....____ > 2 Had to put periods in to keep it in place, but it is 4k+2 diveded by 5 is greater then 2, how do I solve that?
.......5
2.) A person'as body mass in... | 4 | [
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Patent US6683903 - Method and apparatus for synchronization within a spread-spectrum communication system
FIELD OF THE INVENTION
The present invention relates generally to communication systems and in particular, to a method and apparatus for synchronization within such communication systems.
BACKGROUND OF THE INVENT... | 4 | [
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Measure of Noncompactness for Compact Matrix Operators on Some BK Spaces
Journal of Function Spaces
Volume 2014 (2014), Article ID 196489, 7 pages
http://dx.doi.org/10.1155/2014/196489
Research Article
Measure of Noncompactness for Compact Matrix Operators on Some BK Spaces
^1Department of Mathematics, University of... | 4 | [
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Dynamical Analysis of SIR Epidemic Models with Distributed Delay
Journal of Applied Mathematics
Volume 2013 (2013), Article ID 154387, 15 pages
http://dx.doi.org/10.1155/2013/154387
Research Article
Dynamical Analysis of SIR Epidemic Models with Distributed Delay
^1College of Science, Shandong University of Science ... | 5 | [
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factorising quadratic formulas
November 12th 2008, 12:34 AM #1
Newbie
Joined
Nov 2008
Posts
2
Im having trouble factorising:
(x/(16 + x²)^½) - 1/3 = 0
Thats the square root of (16+x*x) divided by x, minus 1/3. I have to find the values that make it equal 0.
Can someone please help me?
Th... | 4 | [
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Cancellation Laws-groups
August 7th 2010, 11:59 PM #1
Newbie
Joined
Aug 2010
Posts
15
Cancellation Laws-groups
if a set is closed and associative with respect to an operation *...and both cancellation laws hold...proove that the set is a group with respect to *.thnx in advance
So for a set S to be a... | 5 | [
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urgent please.needed for tomorrow
October 28th 2007, 03:24 AM #1
marikas
Guest
3. The entropy change, ΔS, associated with the isothermal (i.e.
constant temperature) change in volume of n moles of an ideal
gas from volume V1 to volume V2 is given by the equation
ΔS = nR ln(V2/V1)
where R is the gas ... | 4 | [
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The Complex Network Synchronization via Chaos Control Nodes
Journal of Applied Mathematics
Volume 2013 (2013), Article ID 823863, 11 pages
http://dx.doi.org/10.1155/2013/823863
Research Article
The Complex Network Synchronization via Chaos Control Nodes
^1School of Mathematics and Information Science and School of P... | 4 | [
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Questions concerning Bhabha scattering
It is accepted that the issue of 4-momenta is possibly not the focus of this sub-forum, but the issue was originally raised in connection to understanding the Mandelstam variables in post #5, to
which Fzero responded in post #7 as follows:
fzero
I think that your confusion is ... | 4 | [
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Puzzles Interview Questions and Answers
This page contains the collection of Puzzles Interview Questions and Answers / Frequently Asked Questions (FAQs) under category Basic Common. These questions are collected from various resources like... | 5 | [
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Fraction Reduction in Membrane Systems
The Scientific World Journal
Volume 2014 (2014), Article ID 858527, 10 pages
http://dx.doi.org/10.1155/2014/858527
Research Article
Fraction Reduction in Membrane Systems
^1College of Computer Science, Chongqing University, Chongqing 400030, China
^2Chongqing Key Laboratory of ... | 5 | [
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A Phase Noise Analysis Method for Millimeter-Wave Passive Imager BHU-2D-U Frequency Synthesizer
ISRN Electronics
Volume 2013 (2013), Article ID 750269, 8 pages
http://dx.doi.org/10.1155/2013/750269
Research Article
A Phase Noise Analysis Method for Millimeter-Wave Passive Imager BHU-2D-U Frequency Synthesizer
School... | 4 | [
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Finding normal and tangent to a curve.
November 8th 2010, 11:21 PM #1
Junior Member
Joined
Oct 2010
Posts
63
Finding normal and tangent to a curve.
Hey im doing exam revision and new to this site, the question im stuck on is this"
Find the equation of the tangent and normal for:
f(x)=2x^2-3x+4 a... | 4 | [
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0.01855... | 24,625 | 24625 | |
congruence of two triangles
February 1st 2013, 06:47 AM #1
Junior Member
Joined
Sep 2012
From
halo
Posts
48
congruence of two triangles
Problem: In ΔABC, D is on segment BC, E is on AC and F is the intersection of segments EB and AD. Assume further that AC ≅ BC and EC ≅ DC. Prove ΔAFE ≅ ΔBFD.
The... | 4 | [
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Need to prove |f(x)|<= 1 almost every where.
August 18th 2009, 11:41 PM #1
Member
Joined
Aug 2009
Posts
78
Need to prove |f(x)|<= 1 almost every where.
Let $f :X \rightarrow R$ be a measurable function in $X$ with $m(X)< \infty$.
Show that if $f^n$ is Lebesgue integrable for every $n$ and that $\lim_... | 5 | [
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RGolf: rolling window
May 30, 2014
By Bogumił Kamiński
I have learned a lot from
my last RGolf post
. Therefore today I have another problem from practice.
You have a data set on values of contracts signed by ten salesmen. It has three columns: person id (
p
), contract value (
v
) and time (
t
).
Here is ... | 5 | [
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0.034423828125,
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0.048828125,
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0.01239013671875,
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... | 24,628 | 24628 | |
C program to Find all Roots of a Quadratic equation
Visit this page to learn about roots of quadratic equation if you don't know how to compute it.
Suppose you want of find roots of a quadratic equation ax^2+bx+c=0 where a, b and c are coefficients. This program will ask the coefficients: a, b and c from user and dis... | 4 | [
-0.0177001953125,
0.0086669921875,
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0.0026092529296875,
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0.0074462890625,
0.0308837890625,
-0.07666015625,
0.00762939453125,
-0.1484375... | 24,629 | 24629 | |
1,000 coins are divided into piles (x and y) to give a number x*y. Each of the two piles is divided, yielding two numbers (say a*b and c*d). Repeat until every pile is 1 coin. What is the sum of all the numbers? • /r/math
all 40 comments
[–]CatsAndSwordsDynamical Systems37 points38 points39 points
sorry, this has bee... | 5 | [
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0.09619140625,
0.008056640625,
0.0859375,
-0.0142822265625,
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0.... | 24,630 | 24630 | |
Series Solution of the System of Fuzzy Differential Equations
Advances in Fuzzy Systems
Volume 2012 (2012), Article ID 407647, 16 pages
http://dx.doi.org/10.1155/2012/407647
Research Article
Series Solution of the System of Fuzzy Differential Equations
^1Dipartimento di Mathematica e Informatica, Università degli St... | 5 | [
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The average number of tries
December 18th 2012, 05:15 AM
FelipeAbraham
The average number of tries
Hi
Well, I have a problem here I need help to solve. Probability theory is not my field.
If someone knows how to solve it or knows where I can find tools for it, please contact me or just reply this threa... | 4 | [
-0.04296875,
-0.05126953125,
0.052734375,
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Complex Power Series Boundary Property
July 2nd 2009, 03:42 PM #1
Newbie
Joined
Jun 2009
Posts
3
In Shilov's Elementary Real and Complex Analysis, he writes on page 216:
'As we know, a (complex) power series a0 + a1 (z - z0) + a2 (z - z0)^2 + ... with radius of convergence p may or may not converge a... | 4 | [
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0.0028076171875,
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0.0030670166015625,
-0.10595703125... | 24,633 | 24633 | |
Calculus--Mean Value Theorem (May only need help w/ the algebra?)
March 29th 2009, 08:57 AM #1
Newbie
Joined
Jan 2009
Posts
18
Calculus--Mean Value Theorem (May only need help w/ the algebra?)
Here's the problem:
The value c that satisfies the conclusion of the Mean Value Thm for the function x/(x+2... | 4 | [
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-0.0439453125,
0.007568359375,
-0.00299072265625,
-0... | 24,634 | 24634 | |
Test on a single proportion
February 23rd 2010, 05:07 AM
hazel
Test on a single proportion
A marketing expert for a pasta-making company believes that 40% of pasta lovers prefer lasagna. If 9 out of 20 pasta lovers choose lasagna over other pastas, what can be concluded about the
expert’s claim? Use a 0.05 l... | 5 | [
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Reverse Engineering Sparse Gene Regulatory Networks Using Cubature Kalman Filter and Compressed Sensing
Advances in Bioinformatics
Volume 2013 (2013), Article ID 205763, 11 pages
http://dx.doi.org/10.1155/2013/205763
Research Article
Reverse Engineering Sparse Gene Regulatory Networks Using Cubature Kalman Filter and... | 4 | [
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-0.05859... | 24,636 | 24636 | |
Linear Algebra Proof - Prove that when A+D=0, D is unique.
September 3rd 2007, 10:14 AM #1
Newbie
Joined
Jul 2007
Posts
12
Linear Algebra Proof - Prove that when A+D=0, D is unique.
I need to prove that for each $m \times n$ matrix A, there exists a unique $m \times n$ matrix D such that A+D=O. Where O i... | 4 | [
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0.09375,
0.06396484375,
0.0712890625,... | 24,637 | 24637 | |
Pesky Polynomial Multiplication Problem
July 13th 2010, 11:57 AM
Ingersoll
Pesky Polynomial Multiplication Problem
3a(a -2b)^2. It seems to me that you'd just multiply the numbers inside the parentheses by themselves.
That would give you 3a(a^2+4b); the answer to that is 3a^3 +12ab^2. But that's not the rig... | 4 | [
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0.068359375,
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0.018... | 24,638 | 24638 | |
Finding local max or local min values
December 11th 2012, 07:27 PM #1
Member
Joined
Oct 2011
Posts
153
Finding local max or local min values
Determine where f(x)=8x^3+18x^2-24x-9 has any local maximum or local minimum values.
What I did:
f'(x)=24x^2+36x-24
0=24x^2+36x-24
0=12(x+2)(2x-1)
... | 4 | [
0.08544921875,
-0.0419921875,
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0.1083984375,
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0.06591796875,
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0.035400390625,
0.0191650390625,
-0.0108642578125,
0.0155029296875,
0.044189453125,
... | 24,639 | 24639 | |
If you are dealing with a standard deck of cards-how many...data management
September 30th 2009, 04:44 AM #1
If you are dealing with a standard deck of cards-how many...data management
I don't know where this belongs but this seems close at least.
My partner and I have been going at this for over an hour. We... | 4 | [
0.03857421875,
0.020263671875,
0.0140380859375,
-0.0240478515625,
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0.00634765625,
-0.0590820312... | 24,640 | 24640 | |
Math Help
September 28th 2006, 06:52 PM #1
Senior Member
Joined
Apr 2006
Posts
401
A Series ?
For a specific algorithm, I figured that in the algorithm, for:
n = 3, the answer is 1
n = 4, the answer is 4
n = 5, the answer is 10
n = 6, the answer is 20
n = 7, the answer is 35
n =... | 5 | [
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0.028564453125,
-0.03857421875,
0.00952... | 24,641 | 24641 | |
Frequently Hypercyclic and Chaotic Behavior of Some First-Order Partial Differential Equation
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 679839, 6 pages
http://dx.doi.org/10.1155/2013/679839
Research Article
Frequently Hypercyclic and Chaotic Behavior of Some First-Order Partial Differential Equatio... | 4 | [
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0.0262451171875,
-0.09130859375,
-0.049072265... | 24,642 | 24642 | |
Dirichlet's Test on following sum
May 17th 2010, 11:43 PM #1
Newbie
Joined
May 2010
Posts
2
Dirichlet's Test on following sum
Show that the series 1/(2log2)+1/(3log3)-1/(4log4)-1/(5log5)-1/(6log6)-1/(7log7)+.... is convergent, the rule of signs being that successive terms with the same sign come in group... | 5 | [
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0.080078125,
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On Option Pricing in Illiquid Markets with Jumps
ISRN Mathematical Analysis
Volume 2013 (2013), Article ID 567071, 5 pages
http://dx.doi.org/10.1155/2013/567071
Research Article
On Option Pricing in Illiquid Markets with Jumps
^1Department of Mathematical Sciences, UAE University, P.O. Box 17551, Al-Ain, UAE
^2Depar... | 5 | [
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0.00921630859... | 24,644 | 24644 | |
On semi-local schemes
up vote 3 down vote favorite
2
Background I have searched a bit for the definition/constructions on how to "semi-localize" a scheme, but have been unsuccessful in finding a good reference; I apologize in advance if this topic has
been covered in detail elsewhere (e.g. in a book or article) and wo... | 4 | [
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0.0673828125,
... | 24,645 | 24645 | |
exact value of sin 75^0
September 15th 2012, 09:28 AM #1
exact value of sin 75^0
can anybody let me know and understand why sin 75 deg. be equal this = (sq. rt of 6 + sq rt of 2)/4
Re: exact value of sin 75^0
Hello, rcs!
You are expected to know this identity:
. . $\sin(A+B) \:=\:\sin A\cos B + \s... | 4 | [
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-0.04931640... | 24,646 | 24646 | |
[Haskell-cafe] Functional progr., images, laziness and all therest
Brian Hulley brianh at metamilk.com
Thu Jun 22 09:55:47 EDT 2006
Jerzy Karczmarczuk wrote:
> Brian Hulley wrote:
>> jerzy.karczmarczuk at info.unicaen.fr wrote:
>
>>> you may transform a recurrential equation yielding Y out of X:
>>> Y[n+1] = a*X[n+1]... | 4 | [
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0.02001953125,
0.03369140625,
0.09130859375,
-0.07421875,
0.0043334960937... | 24,647 | 24647 | |
Help with True/False algebra inequality
September 9th 2009, 01:57 PM
sleigh
Help with True/False algebra inequality
Hi. I had the problem below for homework. I think it is true, but I don't know why. Can anyone give me a reason why this is true, because I need to provide an explination. Thanks!
True or Fals... | 4 | [
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0.10009765625,
0.050537109375,
-0.020751953125,
0.0228271484375,
-0.034... | 24,648 | 24648 | |
Donut Toy
If you are a parent, a big brother, a big sister, or a toddler you probably recognize this Fisher-Price^® product. This page describes how I made the donut toy graph. In particular, how did I get the
donuts t... | 5 | [
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0.052978515625,
0.0400390625,
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0.0834960... | 24,649 | 24649 | |
Solutions and Comments
37. Let $\mathrm{ABC}$ be a triangle with sides $a$, $b$, $c$, inradius $r$ and circumradius $R$ (using the conventional notation). Prove that
$\frac{r}{2R}\le \frac{\mathrm... | 5 | [
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-0.02294921875,
0.0274658203125,
... | 24,650 | 24650 | |
Sequences and primes
March 28th 2009, 01:25 PM #1
Sequences and primes
Consider an integer sequence ${\left\{ {{a_n}} \right\}_{n \in \mathbb{N}}}<br />$ satisfying: ${a_n} = a \cdot {a_{n - 1}} + b \cdot {a_{n - 2}}$ for $n \geqslant 2$ ( $a,b \in \mathbb{Z}$ )
Let $p$ be a prime, $p \leqslant \tfrac{n}<br ... | 5 | [
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0.009033203125,
0.003387451171875,
0.0458984375,
-0.0439453125,
... | 24,651 | 24651 | |
Translational Motion Equation Derivation
All that's needed here is conservation of energy. Starting with a constant force (and hence, acceleration), conservation of energy tells us that initial kinetic energy + work done on the particle =
final kinetic energy, or
[tex]E_0 + W = E_f \implies \frac{1}{2} m v_0^2 + m a \... | 4 | [
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... | 24,652 | 24652 | |
Guessing Coin Toss Probability (In deperate need of help!)
October 10th 2012, 08:24 AM
jab1023
Guessing Coin Toss Probability (In desperate need of help!)
Hi all,
I have a quick question about a stats class assignment. We did the classic coin toss experiement. We tossed 10 coins 60 times. The first part asks... | 5 | [
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0.0078125,
-0.01074218... | 24,653 | 24653 | |
Planes, lines, points
March 2nd 2008, 01:08 PM #1
Junior Member
Joined
Feb 2008
Posts
29
Planes, lines, points
One question, 3 parts
A. Find an equation for the plane consisting of all points (x,y,z) that are equidistant from the points (-4,2,1) and (2,-4,3).
B. Find the points A on the line wi... | 4 | [
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0.06787109375,
-0.037109375,
-0.11767578125,
-0.... | 24,654 | 24654 | |
Directional derivative and angles.
April 28th 2009, 05:37 PM #1
Member
Joined
Sep 2007
Posts
94
Directional derivative and angles.
Consider a surface S given by the equation z = f(x,y) where f(x,y)= xe^(4x^2-y^2).
(a) Find the directional derivative Duf in the direction of u parallel to v = 3i+4j at... | 4 | [
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0.048828125,
0.0086669921875,
0.0257568359375,
0.1025390625,
0.014404296875,
-0.016357421875,
-0.0888671875,
-0.0... | 24,655 | 24655 | |
Sets / Counting Problem
June 1st 2009, 11:56 AM #1
Newbie
Joined
Jun 2009
Posts
3
Sets / Counting Problem
Here is the problem.
70 students are enrolled in Math, English, or German. 40 students are in Math, 35 are in English, 30 are in German. 15 students are enrolled in all 3 of the courses. How man... | 4 | [
0.0849609375,
0.01263427734375,
0.004119873046875,
-0.0257568359375,
-0.03466796875,
0.044921875,
0.0498046875,
0.032470703125,
-0.031005859375,
0.0010986328125,
0.053466796875,
-0.08984375,
0.07177734375,
0.041259765625,
0.0546875,
0.020263671875,
-0.10498046875,
-0.0810546875,
... | 24,656 | 24656 | |
DVRs II
DVRs II August 30, 2009
Posted by Akhil Mathew in algebra, algebraic number theory, commutative algebra, number theory.
Tags: discrete valuation rings, Noetherian rings, PIDs, prime ideals, UFDs
trackback
Earlier I went over the definition and first properties of a discrete valuation ring. Today, it’s time t... | 4 | [
-0.043212890625,
-0.042236328125,
-0.11328125,
-0.09814453125,
0.0517578125,
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0.03369140625,
-0.031982421875,
0.10986328125,
0.01141357421875,
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0.03662109375,
0.0537109375,
-0.0081787109375,
-0.039794921875,
-0.103515625,
0.0537109375,
0.0478515625,
-0.... | 24,657 | 24657 | |
Multiple Solutions for Degenerate Elliptic Systems Near Resonance at Higher Eigenvalues
Abstract and Applied Analysis
Volume 2012 (2012), Article ID 532430, 19 pages
http://dx.doi.org/10.1155/2012/532430
Research Article
Multiple Solutions for Degenerate Elliptic Systems Near Resonance at Higher Eigenvalues
^1School... | 5 | [
-0.03076171875,
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0.0244140625,
-0.040771484375,
0.046875,
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-0.0517578125,
-0.0135498046875,
0.03076171875,
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0.09033203125,
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-0.07080078125,
0.05517578125,
0.03857421875,
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-0.08544921875,
... | 24,658 | 24658 | |
Maclaurin series question
How can I expand these expressions with Maclaurin series : $sin(sinx)$ $sin(cosx)$
Last edited by mr fantastic; December 27th 2009 at 02:58 PM. Reason: Clarified question
The same way you would expand anything else. Find $f'(x), f''(x), f'''(x),...,f^n(x)$ using the chain rule. For example, ... | 5 | [
-0.08154296875,
-0.0220947265625,
0.03515625,
0.068359375,
-0.00946044921875,
0.0257568359375,
-0.044189453125,
-0.0111083984375,
0.050048828125,
0.03955078125,
0.1298828125,
-0.039794921875,
-0.0126953125,
-0.011962890625,
0.026611328125,
-0.0223388671875,
-0.0625,
0.02099609375,
... | 24,659 | 24659 | |
6.6 Minkowski's Geometry of Numbers
Next: 6.7 Prime ideals Up: 6 Algebraic Number Fields Previous: 6.5 Groups of invertible
In order to decide whether or not a lattice M is of the form ^ . R (and hence trivial in the class group) we need to find elements M whose norm is as close as possible to that of M. This is a... | 4 | [
-0.03515625,
0.0311279296875,
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0.1103515625,
-0.06982421875,
0.05078125,
-0.083984375,
0.0054931640625,
0.04150390625,
0.0164794921875,
0.006988525390625,
-0.115234375,
-0.0498046875,
0.031494140625,
0.0390625,
-0... | 24,660 | 24660 | |
Volume of a sphere cap
March 9th 2008, 03:47 AM #1
Volume of a sphere cap
Can someone help me out on this problem?
We are supposed to find the volume using integrals. Meaning as x or y changes, the cross-sectional area will change, so we find the equation for the cross sectional area, and then take the
i... | 4 | [
0.047607421875,
0.00848388671875,
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0.046875,
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0.056884765625,
0.04150390625,
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0.0225830078125,
0.0208740234375,
0.0155029296875,
-0.03759765625,
-0.02001953125,
... | 24,661 | 24661 | |
Multivariable Caculus Leverl Curves
April 21st 2009, 05:14 PM #1
Multivariable Caculus Leverl Curves
Am studying for my final exam lol, this question is confusing me as well,
the equation give is f(x,y)=x^2/4 + y^2/9
(a) Sketch at least three labeled level curves of f and the gradient vector at a point ... | 4 | [
-0.04296875,
-0.08935546875,
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-0.09423828125,
-0.038818359375,
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0.0311279296875,
0.0025634765625,
-0.037109375,
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0.0634765625,
0.038818359375,
0.026123046875,
0.047119140625,
-0.0859375,
0.01989746093... | 24,662 | 24662 | |
Improved Liu-Type Estimator of Parameters in
Two Seemingly Unrelated Regressions
ISRN Applied Mathematics
Volume 2014 (2014), Article ID 679835, 6 pages
http://dx.doi.org/10.1155/2014/679835
Research Article
Improved Liu-Type Estimator of Parameters in Two Seemingly Unrelated Regressions
^1S... | 5 | [
-0.05810546875,
-0.06396484375,
0.0400390625,
0.11328125,
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-0.0283203125,
0.08251953125,
-0.01300048828125,
0.08251953125,
-0.0238037109375,
0.03857421875,
-0.005828857421875,
-0.046142578125,
0.000591278076171875,
-0.035400390625,... | 24,663 | 24663 | |
onvolution
Convolution
What do you need to know to understand this topic?
Sections
What is a convolution?
A convolution is a mathematical operation that represents a signal passing through a LTI (Linear and Time-Invariant) system or filter. If we have a signal $s(t)$ passing through a system with impulse
response $... | 4 | [
-0.0810546875,
-0.01348876953125,
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-0.01385498046875,
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0.0283203125,
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0.0419921875,
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-0.048583984375,
-0.08837890625,
-0.05517578125,
0.01080322265625,
0.02856... | 24,664 | 24664 | |
Haskell Quiz/Weird Numbers/Solution Dolio
From HaskellWiki
< Haskell Quiz | Weird Numbers
(Difference between revisions)
Dolio (Talk | contribs) Dolio (Talk | contribs)
(Naive solution) (Efficient sol... | 4 | [
-0.09375,
0.1181640625,
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0.00182342529296875,
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-0.0028228759765625,
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-0.0172119140625,
0.00677490234375,
-0.0380859375,
-0.08544921875,
-0.01080322265625,
-0.0112304687... | 24,665 | 24665 | |
All pairs shortest paths: the Floyd-Warshall algorithm
Here is another way to compute shortest paths. We compute
• shortestpath(s,t,i) : shortest path from s to t that uses at most i edges
Initially
• shortestpath(s,t,0) = 0, if s = t
infinity, otherwise
• shortestpath(s,t,i+1) =
min (
shortestpa... | 4 | [
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0.052490234375,
-0.09130859375,
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-0.091796875,
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-0.021484375,
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0.033447265625,
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-0.07958984375,
0.0654296875,
-0.028564453125,
0.0223... | 24,666 | 24666 | |
trig equation - all solutions
January 21st 2010, 12:03 PM #1
Super Member
Joined
Sep 2008
Posts
607
trig equation - all solutions
solve $cosec^{2}2x - cot2x = 1$
$0 \leq x \leq 180$
replace $cosex^{2}2x$ with $1 + cot^{2}2x = cosex^{2}2x$
$1 + cot^{2}2x -cot2x = 1$
$cot^{2}2x -cot2x ... | 4 | [
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0.00860595703125,
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0.033447265625,
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0.060791015625,
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0.050048828125,
0.04296875,
-0.035888671875,
0.00518798828125,
-0.045654... | 24,667 | 24667 | |
Characterizations of Nonlinear Lie Derivations of
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 245452, 7 pages
http://dx.doi.org/10.1155/2013/245452
Research Article
Characterizations of Nonlinear Lie Derivations of
^1Department of Mathematics, Harbin Institute of Technology, Harbin 150001, China
^2D... | 5 | [
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-0.068359375,
-0.031494140625,
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-0.08203125,
0.055908203125,
-... | 24,668 | 24668 | |
Existence Results for Stochastic Semilinear Differential Inclusions with Nonlocal Conditions
International Journal of Stochastic Analysis
Volume 2011 (2011), Article ID 784638, 17 pages
http://dx.doi.org/10.1155/2011/784638
Research Article
Existence Results for Stochastic Semilinear Differential Inclusions with Nonl... | 5 | [
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0.019775390625,
-0.018310546875,
-0.0888... | 24,669 | 24669 | |
Dimension Spectrum for Sofic Systems
Advances in Mathematical Physics
Volume 2014 (2014), Article ID 624523, 11 pages
http://dx.doi.org/10.1155/2014/624523
Research Article
Dimension Spectrum for Sofic Systems
^1Department of Applied Mathematics, National Dong Hwa University, Hualien 970003, Taiwan
^2Department of A... | 5 | [
-0.053466796875,
-0.02783203125,
-0.078125,
0.06298828125,
0.02294921875,
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-0.004119873046875,
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0.059326171875,
-0.0072021484375,
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0.034423828125,
-0.0143432617187... | 24,670 | 24670 | |
Replicating the Body Fat Example from "Bayesian Model Averaging: A Tutorial" (1999) with BMS in R
February 7, 2011
By BMS Add-ons » BMS Add-ons
In their paper Bayesian Model Averaging: A Tutorial (Statistical Science 14(4), 1999, pp. 382-401), Hoeting, Madigan, Raftery and Volinsky (HMRV) do an exercise in Bayesian ... | 5 | [
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0.0224609375,
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0.06787109375,
0.0084228515625,
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0.068359375,
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-... | 24,671 | 24671 | |
Function Problem
Last edited by mr fantastic; May 28th 2011 at 02:44 PM. Reason: Title.
There is not enough information here for the problem to have a unique solution. I suspect that the intended answer is that $f(x) = x^3+1$, and so f(6) = 217. But in fact if g(x) is an arbitrary
function such that g(1/x) = g(x) and ... | 4 | [
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0.0205078125,
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0.041259765625,
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0.003936767578125,
-0.059814453125,
-0.0... | 24,672 | 24672 | |
Boundedness of One-Sided Oscillatory Integral Operators on Weighted Lebesgue Spaces
Abstract and Applied Analysis
Volume 2014 (2014), Article ID 291397, 7 pages
http://dx.doi.org/10.1155/2014/291397
Research Article
Boundedness of One-Sided Oscillatory Integral Operators on Weighted Lebesgue Spaces
^1Department of M... | 5 | [
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0.... | 24,673 | 24673 | |
3x2^m + 1 = n^2 - find all values such that this is true
July 2nd 2011, 08:06 PM
pikachu26134
3x2^m + 1 = n^2 - find all values such that this is true
I'm having difficulty remembering wot to do with an equation lyk this, im pretty sure its slightly different to the last one i posted and i just cant remember or ... | 4 | [
-0.05224609375,
0.018310546875,
-0.08203125,
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-0.013427734375,
0.... | 24,674 | 24674 | |
Pretty confusing proof: I don't even know what it is I am supposed to prove...
October 10th 2009, 04:54 PM #1
Senior Member
Joined
Jan 2009
Posts
296
Pretty confusing proof: I don't even know what it is I am supposed to prove...
Let f
I have an exam coming up in a week and I don't even know where to... | 5 | [
-0.0810546875,
0.06982421875,
0.08544921875,
0.01373291015625,
0.056884765625,
0.02685546875,
0.01153564453125,
0.0228271484375,
-0.031494140625,
0.046875,
-0.002532958984375,
-0.04296875,
-0.0024871826171875,
0.05810546875,
-0.058837890625,
-0.07275390625,
-0.0869140625,
-0.061523... | 24,675 | 24675 | |
Parameter Selection Guidelines for a Parabolic Sliding Mode Filter Based on Frequency and Time Domain Characteristics
Journal of Control Science and Engineering
Volume 2012 (2012), Article ID 923679, 13 pages
http://dx.doi.org/10.1155/2012/923679
Research Article
Parameter Selection Guidelines for a Parabolic Sliding... | 4 | [
-0.07080078125,
0.04248046875,
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0.021728515625,
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-0.0546875,
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-0.0015716552734375,
0.042724609375,
-0.0830078125,
-0.0179443359375,
0.052001953125,
0.0274658203125,
-0.... | 24,676 | 24676 | |
Transformation trouble: 3x + 3/2(2x - 1) = 2
I keep coming up with the same solution for this problem which differs from the book.
3x + 3/2(2x - 1)= 2
I continue to get 7/15 and the book says it's 7/12. I know this may appear simple but it has me stumped.
First I multiplied by the reciprocal, then I tried distributing... | 4 | [
-0.09912109375,
-0.00946044921875,
0.049072265625,
-0.010986328125,
-0.043701171875,
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0.0091552734375,
-0.06396484375,
0.01055908203125,
-0.038330078125,
0.... | 24,677 | 24677 | |
Determining Linear Independence/Dependence using Determinants
December 14th 2010, 10:30 PM #1
Junior Member
Joined
Sep 2010
Posts
48
Determining Linear Independence/Dependence using Determinants
I'm doing a practice test for my Matrix Algebra exam. One of the questions says to "Use determinants to decide... | 5 | [
0.05224609375,
-0.061279296875,
-0.009033203125,
-0.0537109375,
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-0.10791015625,
-0.001617431640625,
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-0.009033203125,
0.06884765625,
-0.08203125,
0.00286865234375,
-0.02001953125,
-0... | 24,678 | 24678 | |
A Probabilistic Approach to Predator-Prey Relationships: Worth All of the Hoo-Ha?
This is part of a larger series of open notebook posts about how food web structure modifies the effects of predator extinctions. For an introduction and list of other posts, see here.
So, in my last post (notebook entry?), I introduced... | 4 | [
-0.05419921875,
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0.01043701171875,
0.0849609375,
0.026... | 24,679 | 24679 | |
Derivatives! Help!
March 17th 2008, 04:39 PM
tennisgirl
Derivatives! Help!
When air expands adiabatically (without gaining or losing heat), its pressure P and volume V are related by the equation PV^{1.4}=C where C is a constant. Suppose that at a certain instant the
volume is 500 cubic centimeters and the p... | 5 | [
-0.039306640625,
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0.048583984375,
0.01141357421875,
0.06738281... | 24,680 | 24680 | |
[HELP] How do you calculate z-score from this • /r/cheatatmathhomework
[HELP] How do you calculate z-score from this (self.cheatatmathhomework)
submitted by PauliusMM
The begining was: Probability is calculated with normal distribution, what given is mean = 35 and we know that between interval [25,50] we get probabil... | 4 | [
0.043701171875,
0.03759765625,
-0.03515625,
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0.0108642578125,
0.000881195068359375,
0.01416015625,
-0.0... | 24,681 | 24681 | |
the encyclopedic entry of problem page
Hilbert's tenth problem
is the tenth on the list of
Hilbert's problems
of 1900. Its statement is as follows:
Given a Diophantine equation with any number of unknown quantities and with rational integral numerical coefficients: To devise a process according to which it can ... | 4 | [
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0.035888671875,
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0.0322265625,
0.036376953125,
-0.031005859375,
0.005157470703125,
-0.004150390625,
-0.036... | 24,682 | 24682 | |
Anti-derivative problems.
January 29th 2013, 04:11 PM #1
Member
Joined
Dec 2012
From
NY
Posts
105
Thanks
1
Anti-derivative problems.
I'm stumped on these problems:
Find the anti-derivative
a) f ''(t) = 2e^t+2 sint, f(0)=0 f(pi)=0
b) f'(x) = 3/(sqrt(1-x^2)), f(1/2)=6
If someo... | 5 | [
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0.031005859375,
-0.0235595703125,
0.130859375,
0.06591796875,
-0.038818359375,
-0.0245361328125,
-0.06884765625,
0.00323486328125,
0.0228271484375,
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A New Framework of Multiphase Segmentation and Its Application to Partial Volume Segmentation
Applied Computational Intelligence and Soft Computing
Volume 2011 (2011), Article ID 786369, 11 pages
http://dx.doi.org/10.1155/2011/786369
Research Article
A New Framework of Multiphase Segmentation and Its Application to P... | 4 | [
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the encyclopedic entry of vector space
In
mathematics
, with 2- or 3-dimensional
vectors
with
real
-valued entries, the idea of the "length" of a vector is intuitive and can easily be extended to any
real vector space R^n
. It turns out that the following properties of "vector length" are the crucial ones.
1.... | 4 | [
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7.3 Binary Quadratic Forms
Next: 8 Algebraic Schemes for Up: 7 Quadratic fields Previous: 7.2 Naive computation of
Gauss's approach to ideals (which were not defined in his time!) was to represent elements of the class group (groups were also not defined in his time!) by equivalence classes of quadratic forms.
The... | 4 | [
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Find the inverse function, if exists..
April 8th 2009, 06:02 AM #1
Member
Joined
Jan 2009
Posts
236
Find the inverse function, if exists..
hello
am stopped at this problem -_-
let $f(x)=2x^2-8x$ where x>2
Find a formula for the inverse function of it, if exists.
My solution:
f`(x)=4... | 5 | [
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I need help with these 2 problems i just can't figure out for the life of me
September 18th 2009, 08:46 PM #1
Newbie
Joined
Sep 2009
Posts
17
I need help with these 2 problems i just can't figure out for the life of me
are these lines perpendicular, parallel, the same, or neither
(1.) y =2/3 x + 3 a... | 4 | [
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A Reliable Analytical Method for Solving Higher-Order Initial Value Problems
Discrete Dynamics in Nature and Society
Volume 2013 (2013), Article ID 673829, 12 pages
http://dx.doi.org/10.1155/2013/673829
Research Article
A Reliable Analytical Method for Solving Higher-Order Initial Value Problems
^1Department of Math... | 5 | [
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help on derivative of the power of a function
November 16th 2008, 07:52 AM
shinn90
help on derivative of the power of a function
Find the derivative of s= 2x^2 (3-x^3)^6
using product rule
ds/dx = (3-x^3)^6(6x^2) + 2x^3(6)(-3x^2)(3-x^3)^5
ds/dx= (3-x^3)^5(6x^2(3-x^3) -36x^5)
ds/dx= (3-x^3)^5(18x... | 4 | [
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Comment on “Highly Efficient Sigma Point Filter for Spacecraft Attitude and Rate Estimation”
Mathematical Problems in Engineering
Volume 2012 (2012), Article ID 170391, 5 pages
http://dx.doi.org/10.1155/2012/170391
Letter to the Editor
Comment on “Highly Efficient Sigma Point Filter for Spacecraft Attitude and Rate E... | 4 | [
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... | 24,691 | 24691 | |
Help a Dummy Figure Out An Easy Equation!
October 6th 2010, 04:44 PM #1
Newbie
Joined
Oct 2010
Posts
4
Help a Dummy Figure Out An Easy Equation!
Stupid me forgot how to solve equations with two variables. I tried finding a tutorial of some sort on the internet but I can't find one like the question I pre... | 4 | [
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Proving Identities
September 13th 2010, 05:45 PM
taylor1234
Proving Identities
Prove the following identities
1*2^0 + 2*2^1 + 3*2^2 + . . . + n*2^2n-1= (n-1)2^n + 1
Also
1 + 3 + 9 + 27 + . . . + 3^n-1= (3n-1)
2
September 13th 2010, 05:51 PM
Prove It
I assume the second one should be
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Theorem
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
┃ ┃
... | 4 | [
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the encyclopedic entry of Runcinated 24-cell
24-cell
Schlegel diagram
Type Regular polychoron
Uniform index 22
Cells 24 3.3.3.3
Faces 96 {3}
Edges 96
Vertices 24
Vertex figure ... | 4 | [
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Probabilty help
December 10th 2009, 07:59 PM
kittysnyde
Probabilty help
I am unsure about the following problems, I put what I think the answer is, would appreciate any help. Thanks!
1. For two events A and B, suppose P(A)= .45, P(B)=.75 and P(BlA)= .45
Are A and B independent?
I said no. For them... | 4 | [
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Surface area of a sphere
July 31st 2009, 07:24 AM #1
Super Member
Joined
Mar 2006
Posts
705
Thanks
2
Surface area of a sphere
Find the area of the portion of the sphere of radius 2 (centered at the origin) that is in the cone $z > \sqrt {x^2+y^2}$
What I have so far is that:
$A(S)= \int \in... | 5 | [
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... | 24,697 | 24697 | |
Be merciful and help me.
February 1st 2007, 05:34 PM #1
Junior Member
Joined
Oct 2006
From
canada
Posts
68
Be merciful and help me.
Hello people, next week I have my first ever calculus exam, and I’m so confused, I’m having a hard time trying to understand everything, my professor gave us a review sh... | 4 | [
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Combinatorics question
November 28th 2011, 10:34 PM
Mathsdog
Combinatorics question
IN how many ways can the letters in MISSISSIPPI be arranged so that no two Is are adjacent?
The solution is allegedly ${{8}\choose{4}} { 7! \over 2!4!1!}$
But I don't see the logic to this solution. Any insights would ... | 4 | [
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