content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
Calculating Lengthy Repeating Decimals
Date: 10/26/2006 at 21:14:22
From: Cy
Subject: 355/113
Hi, Dr. Math.
I'm currently enrolled in 8th grade algebra, and I just had a question
I was curious about. You know the approximation of pi, 355/113?
Well, I was trying to figure out if I could turn it into a decimal
using ... | 5 | [
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-0.07421875,
-0.031494140... | 37,100 | 37100 | |
[SciPy-user] new Kolmogorov-Smirnov test
josef.pktd@gmai... josef.pktd@gmai...
Sat Nov 29 15:46:14 CST 2008
Since the old scipy.stats.kstest wasn't correct, I spent quite some
time fixing and testing it. Now, I know more about the
Kolmogorov-Smirnov test, than I wanted to.
The kstest now resembles the one in R and i... | 5 | [
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0.047607421875,
0.039... | 37,101 | 37101 | |
WAVES - LCHS Physics
There are three types of waves:
1. Mechanical waves require a material medium to travel (air, water, ropes). These waves are again divided into three different sub-types. 1)Transverse waves cause ... | 4 | [
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-0.0358886... | 37,102 | 37102 | |
intersection of geodesiques
up vote 1 down vote favorite
1
Let $(M,g)$ be a closed riemannian surface . let $\alpha$ be a simple closed geodesique . does there is exist a simple closed geodesic $\beta$ that intersect alpha at only 1 point p such that $[\
alpha]$ and $[\beta]$ does not commute in $\pi_1(M,p)$
riemann... | 5 | [
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Math Forum Discussions
Re: Help with a function for plotting zeros and poles
Posted: Mar 19, 2014 4:24 AM
Sorry about the oversight.
Clear[zeroPole]
zeroPole[tf_TransferFunctionModel] :=
First /@
Map[{Re[#], Im[#]} &,
Flatten[Through@{TransferFunctionZeros, TransferFunctionPoles}@tf,
1], {3}];
tf1 = TransferFun... | 5 | [
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-0.0... | 37,104 | 37104 | |
ultrafilters' succession
up vote 0 down vote favorite
hi
I'n looking for a increasing and bounded ultrafilters' succession in natural numbers with Rudin-Keisler order, actually I need to prove there is that succession the idea is
$U_1,U_2,....$ with $U$ supreme and for all n $U_n < U$ for $h_n$ in Rudin-Keisle order... | 4 | [
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0.01263427734375... | 37,105 | 37105 | |
Quick tests with Riemann zeta function code in a few languages
Posted on November 30, 2013 by Joe
I am a self admitted speed freak … I like fast things. I like playing with the new shiny as well, to get a feel for its utility and capabilities.
I’ll freely admit I’ve been quite excited about the Julia language. I lik... | 4 | [
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0.03... | 37,106 | 37106 | |
Continuous Compound Interest problem
December 14th 2009, 11:51 AM #1
Junior Member
Joined
Mar 2008
Posts
38
Continuous Compound Interest problem
So I know this is the formula,
A = Pe rt
To what final amount will an initial investment of $5,000 grow if the interest rate is 4% per year compounded ... | 4 | [
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Brain Teasers
Re: Brain Teasers
Re: Brain Teasers
36. A man standing on a platform observes a train going in one direction takes 8 seconds to pass him. Another train of the same length going in the opposite direction takes 13 seconds to pass him.
What would be the time taken by the two trains to cross each other?
3... | 4 | [
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-0.0062255859375... | 37,108 | 37108 | |
Questions on Graph transformations
March 21st 2008, 01:32 AM
Tangera
Questions on Graph transformations
Hello! I am a little confused about graph transformations and I have some questions that I don't really know how to solve...Please help! Thank you!
1)
The transformations A,B and C are as follows:
... | 4 | [
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0.006988525... | 37,109 | 37109 | |
a variation on the theory of equitable partitions for graphs
up vote 1 down vote favorite
Assume you have a graph with an equitable partition with respect to cells $V_1,\ldots,V_n$. Accordingly, you can take the cellwise average value of a function on the node set - in other words, the
projection of the node space ont... | 4 | [
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0.0... | 37,110 | 37110 | |
Please help in transforming rectangle coordinates to spherical coordinates.
March 19th 2011, 12:38 PM #1
Junior Member
Joined
Nov 2009
Posts
58
Please help in transforming rectangle coordinates to spherical coordinates.
I am doing this as a practice of transforming $\vec B \;X\; \vec C = \vac A \;$ using... | 5 | [
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0.05... | 37,111 | 37111 | |
Proving if it's true (Equality)
December 4th 2010, 08:07 PM
Cthul
Proving if it's true (Equality)
http://209.85.48.8/9963/162/upload/p2222992.gif
I'm no sure how to prove this equality true.
(Oh and I used an image instead of latex, because I don't know how, someone also tell me how to make to the power ... | 4 | [
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0.09521484375,
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-0.037841796875,
0.06... | 37,112 | 37112 | |
8th Grade MST Design Studio
Parents and Students.
I so miss all your faces and your energy. I can’t believe I have missed most of my favorite two units- energy and Rube Goldbergs and lines and equations.
I got an email from a student that you didn’t know where to post Rube Goldbergs. You can post them here for now!... | 4 | [
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0.07080078125,
0.038330078125,
0.0096435546875,
-0.02197265625,
-0.06640625... | 37,113 | 37113 | |
Maarten
margdistfit: Post-estimation command that compares the observed and theoretical marginal distributions.
Author: Maarten L. Buis
margdistfit is a post-estimation command for checking how well distributional assumptions of a parametric regression model fit to the data. It does so by comparing the marginal dist... | 5 | [
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When two k-varieties with the same underlying topological spaces isomorphic?
up vote 9 down vote favorite
4
I have a little problem. I'm probably being just so careless..... Here k-varieties are all integral separated k-schemes of finite type over k, where k is a field.
Suppose $X, Y$ are $k$-varieties, and let $f :X... | 5 | [
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BigInteger Square Root in F#
Introduction
I have been dabbling around with the BigInteger type in F# and noticed that .NET does not provide an integer square root function for this type. So I have built a square root function that takes a
BigInteger and returns a BigInteger. In F# parlance, it’s BigInteger -> BigInteg... | 4 | [
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0.050537109375... | 37,116 | 37116 | |
A linear map and eigenvalue problem
May 24th 2009, 04:36 AM #1
A linear map and eigenvalue problem
Hi,
I'd be immensely grateful for any help with this problem:
Let $V$ be a finite-dimensional vector space, and let
$A : V \to V$ be a linear operator (a linear map) such that $AB=BA$, for every linea... | 5 | [
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0.006317138671875,
-0.027... | 37,117 | 37117 | |
Find the equation of tangent and normal to the curve
December 28th 2009, 09:58 PM #1
Banned
Joined
Dec 2008
From
Mauritius
Posts
523
Find the equation of tangent and normal to the curve
Question : Find the eq of tangent and normal to the curve
$y(x-2)(x-3)-x+7 = 0$
at the point where the curv... | 4 | [
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0.0196533203125,
-0.06494140625,
-0.01... | 37,118 | 37118 | |
Differentiation .. Quadratic Rule problem :(
November 24th 2008, 02:27 AM
jimzer
Differentiation .. Quadratic Rule problem :(
hey guys i have a little problem i cant get my head around
i undertsand that
$y=uv'+vu'$
but this question
$(x-9)(x-3)^{0.5}$
thats (x-3)^0.5 which is root (i don... | 5 | [
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... | 37,119 | 37119 | |
Math Forum Discussions
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Topic: I need to demonstrate that 3^80 -2^20 is divisible... | 4 | [
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0.06787109375,
0.07080078125,
0.0537109375,
0.006805419921875,
-0.08349609375,
-0.039550... | 37,120 | 37120 | |
Splitting a space into positive and negative parts
up vote 2 down vote favorite
2
Let $V$ be a vector space over $\mathbb R$. A symmetric bilinear pairing on $V$ is a linear map $a: V\otimes V \to \mathbb R$. Because $\mathbb R$ is characteristic not-two, I will freely confuse
symmetric bilinear pairings with quadrati... | 4 | [
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0.0157470703125,
0.06494140625,
0.03759765625,
0.0152587890625... | 37,121 | 37121 | |
Probability: Sums and Products of Random Variables
Suppose that X is uniformly distributed on (0,2), Y is uniformly distributed on (0,3), and X and Y are independent. Determine the distribution functions for the following random variables:
a)X-Y
b)XY
c)X/Y
3. The attempt at a solution
ok so w... | 4 | [
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0.01141357421875,
-0.05517578125,
-0.0... | 37,122 | 37122 | |
Existential instantiation in Hilbert-style deduction systems
up vote 2 down vote favorite
In some deduction systems there is a rule* that given $\exists x (\phi(x))$, we can infer $\phi(y)$, where $y$ is a fresh variable (i.e., one we haven't yet mentioned in this context). Call this rule
"EI."
(Edit: in the opening ... | 4 | [
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0.0186767578125,
-0.07519... | 37,123 | 37123 | |
Find Angles, Area, Perimeter of a Parallelogram
Date: 03/23/2001 at 21:13:31
From: Jamie
Subject: Finding indicated measures with little information
I can't understand how to find indicated measures when I am given
little information to begin with. Here is an example of my problem.
A----------B
... | 4 | [
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-0.0693359375,
-0.07080078125,
0.0218... | 37,124 | 37124 | |
Special Triangles Question
June 1st 2011, 05:51 AM #1
Junior Member
Joined
Jun 2011
Posts
38
Special Triangles Question
I am looking for help with this question from my grade 11 advanced functions course:
csc θ = -17/15 where 270° ≤ θ ≤ 360° and
cot β = - 3/4 where 90° ≤ β ≤ 180°.
Find the ... | 4 | [
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0.05126953125,
0.0162353515625,
0.0194091796875,
-0.0185546875,
-0.00427... | 37,125 | 37125 | |
subalgebra of a matrix algebra
up vote 6 down vote favorite
Let $K$ be an algebraic closed field and $M_n(K)$ the $K$-algebra of all matrices $n\times n$ over $K$. If $L$ and $M$ are two commutative isomorphic subalgebras of $M_n(K)$ it is true that there
exista a regular matrix $S\in M_n(K)$ such that $SLS^{-1}=M$. T... | 4 | [
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-0.0673828125,
-0.0654296875,
0.1171875,
0.0281982421875,
0.065429687... | 37,126 | 37126 | |
First-order differential equation problem
May 4th 2012, 12:26 PM #1
Newbie
Joined
Apr 2012
From
UK
Posts
7
First-order differential equation problem
dy/dx=4(y^4) What I did: dx/dy = 1/(4(y^4); x= the integralof 0.25(y^-4) = -1/12(y^-3) + c The answer is at the back of the book is 3(y^3)(4x+c) + 1 =0.... | 5 | [
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0.08984375,
-0.01129150390625,
0.00781... | 37,127 | 37127 | |
directional derivative
October 25th 2008, 07:00 PM #1
Junior Member
Joined
Sep 2008
Posts
44
directional derivative
Hello everyone,
Could you please tell me if this is correct?
FInd the directional derivative using f(x, y, z)=xy+z^2 as you leave the point (1,1,0) heading in the direction of the... | 5 | [
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0.0830078125,
0.038818359375,
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-0.0166015625,
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-0... | 37,128 | 37128 | |
How effective is Low-E glass in windows and doors
Posted on February 29, 2012 by abe
Question: What is the annual savings if I upgrade from Clear glass to Low-e glass on the 5610 Series Single Hung window.
Assumption: Average temperature differential between outside and inside =20°F
“U Value” is actually an enginee... | 4 | [
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Lab
Labs for The Most Complex Machine
xSortLab Lab: Sorting and the Analysis of Algorithms
ONE OF THE MOST COMMON OPERATIONS performed by computers is tha... | 4 | [
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Does countable compactness imply local compactness in Hausdorff spaces?
up vote 3 down vote favorite
1
The question arose while comparing the notions of compactness, countable compactness, local compactness, and "Lindelofness" in Hausdorff spaces. It is straightforward to show that compactness implies
any of the other... | 4 | [
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Math Help
November 2nd 2008, 10:00 PM #1
Newbie
Joined
Nov 2008
Posts
20
Centroid
Find the centroid of the region bounded by
y=3x^2+6x, y=0 and x=3.
So what I've done so far
0<x<3
0<y<3x^2+6x
those are the bounds
and i take the double integral using those bound to find m
but... | 4 | [
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0.080078125,
-0.0036773681640... | 37,132 | 37132 | |
Poincare inequality for the annulus
up vote 2 down vote favorite
2
Assume that $A=A(r,1)=\{x: r<||x||<1\} \subset R^n$ is an annulus.
Whether is known the constant of Poincare inequality for A or some its estimation (w.r.t. $L^2$): the constant $C$ in the inequality $||f||_ {L^2(A)}\le C ||\nabla f||_{L^2(A)},$ where... | 5 | [
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Help understanding Replacement theorem Friedberg
January 26th 2013, 09:47 AM
gordo151091
Help understanding Replacement theorem Friedberg
Hello everyone, im having trouble understanding the Replacement Theorem proof outline in Friedberg Linear Algebra 4th pg 45.
Theorem 1.10 (Replacement Theorem)
Let $... | 4 | [
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-0.0032348632812... | 37,134 | 37134 | |
An optimization problem, non complete bipartite graph and hungarian algorithm
up vote 2 down vote favorite
I have two tables at my disposal, one work dataset and one reference dataset. Each dataset has got two columns, lets say these are fields A and B. I would like the rows in reference dataset with the
rows in work ... | 4 | [
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Continuation passing as a reflection
We can write any expression like $f(g(x,y))$ as a full binary tree where the nodes denote evaluation of the left child at the right, and the leaves are values:
$\begin{array}{ccccccc}&&ev\\&\swarrow&&\searrow\\f&&&&ev\\&&&\swarrow&&\searrow\\&&ev&&... | 4 | [
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0.1... | 37,136 | 37136 | |
GPGPU with WebGL: solving Laplace's equation
GPGPU with WebGL: solving Laplace’s equation
This is the first post in what will hopefully be a series of posts exploring how to use WebGL to do GPGPU (General-purpose computing on graphics processing units). In this installment we will solve a
partial differential equation... | 4 | [
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0.02... | 37,137 | 37137 | |
Linear algebra: Prove the matrix having elements a_ij is invertible.
June 14th 2008, 02:11 PM
mathwizard
Linear algebra: Prove the matrix having elements a_ij is invertible.
Prove the following theorem:
If $t_1, t_2, ..., t_n$ are distinct points in an interval $[a,b]$, and if distinct points $s_1, s_2, ...... | 5 | [
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-0.... | 37,138 | 37138 | |
Constructing a Bijection
May 18th 2008, 04:56 PM #1
Global Moderator
Joined
Nov 2005
From
New York City
Posts
10,616
Thanks
9
Constructing a Bijection
A problem in my book states to prove $n\cdot \aleph_{\alpha} = \aleph_{\alpha}$ where $n$ is a positive integer.
This problem requires to cons... | 4 | [
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0.06... | 37,139 | 37139 | |
Normal distribution problem
March 11th 2009, 08:16 AM #1
Normal distribution problem
Hey, I've always been bad at these, and I don't even know what to plot into the calculator, so any help is great appreciated, thanks!
The weights of adult males of a type og dog may be assumed to be normally distributed with... | 5 | [
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0.0057678222656... | 37,140 | 37140 | |
Length of Coiled Belt
Date: 04/11/2003 at 23:36:31
From: Manny Rivas
Subject: Length of coiled belt
Working with conveyor belts we use a formula that gives a very close
approximation of the length of a coil of belt, but I would like to
know the reasoning of it. The outside and inside diameters of the coil
(in inches)... | 4 | [
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0.0402832... | 37,141 | 37141 | |
Problems with Topology question
December 30th 2008, 01:47 PM #1
Problems with Topology question
I'm stuck on a question. It states to consider the set $Y = [-1,1]$ as a subspace of $\mathbb{R}$, it being the standard topology. And now I have to consider which are open in $\mathbb{R}$ and
which are open in $Y$... | 4 | [
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0.07373046875,
... | 37,142 | 37142 | |
dy
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modphysnoob Group Title
please look at my ... | 4 | [
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Solve for rotations {rx,ry,rx} given before and after vectors
October 17th 2008, 07:35 PM #1
Newbie
Joined
Oct 2008
From
Houston
Posts
2
Solve for rotations {rx,ry,rx} given before and after vectors
We can use the 3x3 rotation matrix R to determine the effect of rotations about the principle axes:
... | 5 | [
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0.116... | 37,144 | 37144 | |
Exponential and Trig in One Integral
March 6th 2010, 09:43 AM #1
Junior Member
Joined
Nov 2009
Posts
50
Exponential and Trig in One Integral
How do you integrate $\int e^{x}\cos{(2x)}dx$?
I started to try integration by parts but I noticed quite quickly that it would not work because I would continu... | 5 | [
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0.0... | 37,145 | 37145 | |
Ratio and Root Tests
August 4th 2010, 07:29 AM #1
Member
Joined
May 2010
From
WI - USA
Posts
129
Ratio and Root Tests
Good morning All,
I am working on ratio and root tests for infinite series. I would like to post what I have done, and see if anyone agrees with it. Please see below:
$<br ... | 5 | [
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0.0299072265... | 37,146 | 37146 | |
Math Forum Discussions
Re: Joel David Hamkins on definable real numbers in analysis
Posted: Jun 25, 2013 5:27 PM
On Tuesday, June 25, 2013 1:43:36 PM UTC-7, muec...@rz.fh-augsburg.de wrote:
> On Tuesday, 25 June 2013 17:07:36 UTC+2, dull...@sprynet.com wrote:
>
> >> There are not uncountably many reals, neither in the... | 5 | [
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-0.0712890625,
-0.0003833770751953125... | 37,147 | 37147 | |
What is the simplest, most elementary proof that a particular number is transcendental?
up vote 32 down vote favorite
15
I teach, among many other things, a class of wonderful and inquisitive 7th graders. We've recently been studying and discussing various number systems (N, Z, Q, R, C, algebraic numbers, and even
qua... | 4 | [
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0.01373291015625,... | 37,148 | 37148 | |
Need a proof of the polynomial generalization of fermat's little theorem
September 7th 2012, 12:34 AM #1
Newbie
Joined
Sep 2012
From
Montereale
Posts
2
[solved]Need a proof of the polynomial generalization of fermat's little theorem
Disclaimer: I'm not a mathematician, nor a student of math. So my kn... | 5 | [
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0.006072998046875,
0.014... | 37,149 | 37149 | |
3.1 - Introduction to expressions
What is an expression?
A mathematical expression is a set of numbers and letters that represent numbers, combined using mathematical operations such as addition, subtraction, multiplication, division, roots, powers and
functions.
Notice that an = sign is not allowed. Including o... | 4 | [
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0.058... | 37,150 | 37150 | |
Expectation of time integral of Wiener process
up vote 1 down vote favorite
2
I am trying to calculate $E(\int_0^T {W_s ds})$, where $W_s$ is a standard Brownian motion.
Now two approaches I can think of:
1) Take a partition of $[0,T]$. Calculate $E(\sum {W_{t_i}(t_{i+1} - t_i)})$ and take the limit as you shrink th... | 5 | [
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-0.02197265625,
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0.018798828125,
0.08203125,
-0.0354003... | 37,151 | 37151 | |
Performance Analysis of Connection Admission Control Scheme in IEEE 802.16 OFDMA Networks
(IJCSIS) International Journal of Computer Science and Information Security,
... | 4 | [
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... | 37,152 | 37152 | |
Math Forum Discussions
Re: zero sets of infinitely differentiable functions
Posted: Dec 3, 2013 11:03 AM
On Tue, 03 Dec 2013 01:07:45 -0500, quasi <quasi@null.set> wrote:
>I think the following is true ...
>
>Proposition:
>
>For any closed subset A of R there exists an infinitely
>differentiable function f:R -> R suc... | 5 | [
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-0.044189453125,
-0.044921875,
-0.07275390625... | 37,153 | 37153 | |
Mathematical proofs
January 30th 2009, 06:29 AM
treetheta
Mathematical proofs
For all real numbers x and y, $sqrt(xy)$ is less than or equal to
X + Y
-----
2
provide a counter example for statements that are false and provide a complete proof for those that are true
January 30th 2009, 06:52 AM... | 4 | [
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-0.0245361328125,
-0.03735351... | 37,154 | 37154 | |
What is the pathwidth of the 3D-grid (mesh or lattice) with sidelength k?
up vote 5 down vote favorite
This question is now also on http://cstheory.stackexchange.com/questions/4081/what-is-the-pathwidth-of-the-3d-grid-mesh-or-lattice-with-sidelength-k, where a discussion started, and one reference
seems to be found.
... | 4 | [
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0.0272216796875,
-0.002029418945312... | 37,155 | 37155 | |
[SciPy-User] raising a matrix to float power
Alexey Brazhe brazhe@gmail....
Sun Jul 11 04:13:09 CDT 2010
Yes, my problem seems to be solved with this:
#--------------------------------
def winvhalf(X):
e, V = linalg.eigh(X)
return dot(V, dot(inv(diag(e+0j)**0.5),V.T))
## I need W = W(W^T W)^{-1/2}
x = dot(... | 4 | [
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-0.039306640625,
-0.0299072265625,
0.07177734375,
0.03759765625,
-0.00677490234375,
-0.0054931640625,
0.0166015625,
0.00738525390625,
0.1171875,
-0.0888671875,
0.0473632812... | 37,156 | 37156 | |
Please help me solve this math word problem!
February 27th 2013, 09:06 PM #1
Junior Member
Joined
Feb 2013
From
Edmonton Alberta
Posts
32
Please help me solve this math word problem!
It takes a freight train 2 hours longer to travel 300 miles than it takes an express train to travel 280 miles. The ra... | 4 | [
0.025390625,
0.002593994140625,
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0.03515625,
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0.047607421875,
-0.027587890625,
0.0289306640625,
-0.0... | 37,157 | 37157 | |
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Topic: max/min of quadratic trigonometric functions
Repli... | 4 | [
-0.064453125,
-0.0068359375,
0.02978515625,
-0.0390625,
-0.002838134765625,
0.0103759765625,
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0.080078125,
-0.005889892578125,
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0.04541015625,
0.047119140625,
0.041015625,
0.03955078125,
0.0185546875,
-0.0380859375,
0.06396484375,
-0.0966796875,
-0.05... | 37,158 | 37158 | |
How would I solve for x?
May 4th 2010, 06:24 PM #1
Member
Joined
Nov 2009
Posts
171
How would I solve for x?
1000 = 50(2)^(x/2)
How would I solve for x? I'm confused about how to get rid of the exponent part so I can isolate x
$1000 = 50 \cdot 2^{\frac{x}{2}}$
divide both sides by 50 ...
... | 4 | [
0.035888671875,
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0.04345703125,
0.07177734375,
0.04541015625,
0.099609375,
-0.11328125,
0.031982421875,... | 37,159 | 37159 | |
2. Maclaurin Series
By M. Bourne
In the last section, we learned about Taylor Series, where we found an approximating polynomial for a particular function in the region near some value `x = a`.
We now take a particular case of Taylor Series, in the region near `x = 0`. Such a polynomial is called the Maclaurin Serie... | 5 | [
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-0.0015716552734375,
-0.0400390625,... | 37,160 | 37160 | |
Quadratic-Quadratic Systems Algebraically Question
December 21st 2012, 11:06 AM #1
Newbie
Joined
Nov 2012
From
Vancouver
Posts
21
Quadratic-Quadratic Systems Algebraically Question
Solve Each System:
x^2 + y^2 = 20
y = x^2
This might be a dumb question question, but 20 isn't a square nu... | 4 | [
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0.07421875,
-0.03125,
-0.046875,
-0.006... | 37,161 | 37161 | |
Questions arising while studying for midterm.
October 14th 2010, 12:52 PM
Vanilla
Questions arising while studying for midterm.
I have been going through some practice questions online to prepare for my midterm and ran into a few questions I had problems with but for which there where no explanations for solving... | 5 | [
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0.034423828125,
-0.0220947265625,
0.08447265625,
0.006866455078125,
-0.06... | 37,162 | 37162 | |
Find the equation
December 28th 2012, 05:18 PM
hahalol
Find the equation
Find the equation of the line that passes trough point (0,1) such that the area, S, of the region enclosed by this line and the parabola y=x^2 is (5√5)/6.
This is what I did:
I found the equation of the line which is y=x+1
Then... | 4 | [
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0.00830078125,
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-0.11376953125,
-0.07958... | 37,163 | 37163 | |
Tricky? Definate Integrals
Some things are best left to the calculator: $\int_1^5 \frac{ln(x)}{x^2 + 2x + 5}dx = 0.187 \ \text{units}^2$
This was a past test question....we are not allowed to use calculators!....so there is definalty a way to find the exact answer. I just don't know how. If u don't believe me, the guy... | 4 | [
-0.030029296875,
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0.06787109375,
-0.0908203125,
0.0242919921875,
-0.033935546875,
-0.0... | 37,164 | 37164 | |
Longitude and Latitude to Determine Distance
Date: 5/21/96 at 21:9:50
From: Peter Atlas
Subject:Longitude and Latitude to Determine Distance
On the College Geometry page, a user writes in asking:
I've been looking for the equation that finds the distance between
two cities, given the latitude and longitude of both ... | 5 | [
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0.05395507... | 37,165 | 37165 | |
General solutions for HJB equations in a special case.
up vote 2 down vote favorite
3
I am reading the book of Wendell Flemming in control theorem to learn the HJB equation
Here is the setting that interests me: Let $g_i: i=1,2$ be $C^2 =C^{2}(-\infty,\infty)$ functions such that $0\leq g_1(x)\leq C_1$ and $0\leq g... | 4 | [
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0.03955078125,
-0... | 37,166 | 37166 | |
Matrices Transformation
May 28th 2014, 03:56 AM #1
Junior Member
Joined
Oct 2013
From
Ireland
Posts
54
Matrices Transformation
I would very much appreciate help with the following question:
(i) Prove that the dot product of any two vectors u,v ∈ Rn is u^Tv.
(ii) Given a Matrix A and vectors ... | 5 | [
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0.009033203125,
-0.037841796875,
0.0341796875,
-0.0157470703125,
0.00207519... | 37,167 | 37167 | |
bounding the trace of a matrix product by the operator norms; generalized Hölder inequality?
up vote 4 down vote favorite
1
Let $A_i$ with $i=1,\dots,N$ and $p$ be real $M\times M$ matrices. Further, let $p$ be positive definite, i.e., $p\succ 0$, with $Tr(p)=1$. Let $0< a_i<1$ and $\sum_{i=1}^N a_i = 1$.
Claim: $Tr(... | 5 | [
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0.130859375,
0.09033203125,
0.072... | 37,168 | 37168 | |
Logarithmic limit?
June 9th 2009, 07:17 AM #1
Logarithmic limit?
Evaluate:
$\lim_{n\rightarrow \infty} \{\log_{n - 1} n\cdot \log_{n} (n + 1)\cdot \log_{n + 1} (n + 2)\mbox{...}\log_{n^k - 1} n^k\}$, where $k\in\mathbb{N}$
$\log_{n-1}(n)\cdot\log_{n}(n+1)\cdot\log_{n+1}(n+2)\cdot.. .\cdot\log_{n^k-1}(n^... | 5 | [
0.01531982421875,
-0.026123046875,
-0.01153564453125,
-0.0517578125,
0.0036773681640625,
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0.020751953125,
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0.052490234375,
0.005523681640625,
-0.002227783203125,
0.01190185546875,
0.036865234375,
-0.10107421875,... | 37,169 | 37169 | |
Is the space of degree $d$ curves with marked smooth points dense inside the space of curves with marked points?
up vote 0 down vote favorite
1
Let $\mathcal{D} \approx \mathbb{P}^{\delta_d} $ be the space of nonzero homogeneous degree $d$ polynomials in three variables upto scaling, where $\delta_d = \frac{d(d+3)}{2}... | 5 | [
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-0.10107421875,
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0.02490234375,
-0.033447265625,
-0.00946044... | 37,170 | 37170 | |
Pathways to Astronomy 3rd Edition Chapter 79 Solutions | Chegg.com
(The 20 kpc galaxy is more massive; about 1.25 times the mass of the 4 kpc galaxy).
We want to use M<r = V2 × R/G to compare the masses—it is not necessary to directly calculate them (although that can also be used to find the answer). The mass is dire... | 4 | [
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0.011962890625,
0.09765625... | 37,171 | 37171 | |
Complex line bundle over curves
up vote 1 down vote favorite
3
There is a well known correspondence between line bundles over curves and divisors. For each line bundle, consider a rational section, take poles and zeros and we have a corresponding divisor (up to
linear equivalence ). But what if there is no such sectio... | 5 | [
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-0.0092773... | 37,172 | 37172 | |
Portfolio Analysis in US stock market using Markowitz model
IJASCSE Vol 1, Issue 3, 2012
Oct. 31
Portfolio Analysis in US stock market using Markowitz model
Emmanuel, Richard Enduma
... | 4 | [
0.054931640625,
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0.02294921... | 37,173 | 37173 | |
What can be the cohomology ring of a manifold?
up vote 11 down vote favorite
8
Is there something well-known about which ring can be a cohomology ring of a manifold? More concretely, I would be interested in the following question: does there exists an $m$, s.t. for each $r,s\
in\mathbb{N}$ and $\beta_{i,j}^k\in\mathb... | 4 | [
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0.060302734375,
0.007293701171875,
0.09765625,
... | 37,174 | 37174 | |
differential help
June 16th 2011, 03:46 AM #1
differential help
solve when x=0 and y= 2
ok I have setup as shown`(is this ok?). is there some rule about F/F'? to make it easier to solve?
many thanks
Re: differential help
Re: differential help
\displaystyle \begin{align*} (2y + 4)\,\frac{dy}{dx... | 5 | [
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0.041259765625,
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-0.0673828125,
0.0673828125,
-0.011962890625,
0.051513671875,
-0.0030517578125,
... | 37,175 | 37175 | |
First Year Linear Algebra Assignment Question
October 8th 2009, 12:50 PM #1
Newbie
Joined
Oct 2009
Posts
4
First Year Linear Algebra Assignment Question
I dont know how to go about doing this, well i know how to find the conditions but the answer i come up with is in a different format than the input for... | 5 | [
-0.0791015625,
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0.029052734375,
0.12890625,
-0.0654296875,
-0.041015625,
-0.0... | 37,176 | 37176 | |
i need help with the following limits questions
July 8th 2008, 02:50 AM #1
Banned
Joined
Jul 2008
Posts
5
i need help with the following limits questions
so far i can only do some types but when they vary its confusing!
lim x^2 − 5x + 2.
x->4
lim 5 sin x
x->0 x
lim 1
1 + sin x
... | 4 | [
-0.0390625,
0.011474609375,
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0.0498046875,
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0.021240234375,
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0.06494140625,
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0.023681640625,
-0.001251220703125,
-0.03... | 37,177 | 37177 | |
Density function problem?
July 20th 2011, 02:13 AM #1
Senior Member
Joined
Oct 2009
Posts
295
Thanks
9
Density function problem?
I'm not even sure if that's the proper thing to call it, but here's the question.
A point is uniformly distributed within the disk of radius 1. That is, its density is... | 4 | [
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-0.006011962890625,
-0.027099609375,
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0.0693359375,
0.0771484375,
-0.0203857421875,
-0.056396484375,
0.06005859375,
-0.15625... | 37,178 | 37178 | |
More function problems...
February 9th 2010, 05:37 PM #1
Junior Member
Joined
Feb 2010
Posts
42
More function problems...
Find the points on the curve y = 2/3x + 2 where the tangent is parallel to the line y = (-3/2x) - 1
I know the slope of the tangent is -3/2 as it is parallel to the line y = (-3/... | 5 | [
-0.054443359375,
-0.07177734375,
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-0.033447265625,
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0.030517578125,
0.026611328125,
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-0.06787109375,
0.08447265625,
-0.038818359375,
0.037841796875,
0.10986328125,
-0.07177734375,
0.... | 37,179 | 37179 | |
Analytical treatment of quantized electromagnetic field (Mathematical and physical aspects)
King Saud University Repository >
King Saud University >
COLLEGES >
Science Colleges >
College of Science >
College of Science >
Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/8825
Ti... | 4 | [
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0.035400390625,
-0.07958984375,
-0.0625,
... | 37,180 | 37180 | |
Surface Integrals
November 14th 2013, 03:11 PM #1
Newbie
Joined
Oct 2012
From
Houston
Posts
21
Surface Integrals
Evaluate the following. (Give an exact answer.)
Question is
$\iint\limits_{S} f(x,y,z) \, dS$
f(x,y,z)= $\sqrt{x^2+y^2+z^2}$
$S: z=\sqrt{x^2+y^2}~,(x-1)^2+y^2\le1$
... | 5 | [
0.019287109375,
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0.044189453125,
-0.051025390625,
-0.0167236328125,
0.01544189453125,
-0.099... | 37,181 | 37181 | |
Finding a basis.
October 21st 2009, 09:57 PM #1
Member
Joined
Sep 2008
Posts
81
Finding a basis.
I have a question here that asks to find a basis, which states:
Find a basis for V, where V = {T belongs to L(R²,R³)| T(1,2) = (0,0)}
Could anyone offer any ideas on how to tackle this question? I a... | 5 | [
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0.0361328125,
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-0.044677734375,
0.008544921875,
0.00335693359375,
-0.06298828125,
-... | 37,182 | 37182 | |
Memo's Island
The Euclid Algorithm
provides a solution to the greatest common divisor (GCD) of two
natural numbers
$x_{1}$ and $x_{-2}$
,
denoted by $GCD(x_{1}, x_{2})$. This will produce the largest integer that divides $x_{1}$ and $x_{2}$. Solution is proposed by Euclid of Ancient Greece. This can be formulated ... | 4 | [
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0.032958984375,
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0.033935546875,
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0.0201416015625,
0.032958984375,
-0.044189453125,
0.029296875,
... | 37,183 | 37183 | |
Concavity
November 15th 2009, 09:15 AM #1
Junior Member
Joined
Oct 2009
Posts
26
Concavity
For the function f(x)=(x^(2)+4x+(11/4)e^(x) I need to find where it is concave up.
So, I found the first derivative and then the second derivative which is,
f''(x)= e^(x)(x^(2)+8x+(51/4))
Then, I found... | 4 | [
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Equation for eigenline
May 14th 2009, 01:27 AM #1
Junior Member
Joined
Jan 2009
Posts
69
Equation for eigenline
Hi
Im having trouble with finding the equation of an eigenline. I can see that
$\left(\begin{array}{cc} 1 & 2\\<br /> 3 & 2\end{array}\right)\left(\begin{array}{c}<br /> x\\<br /> y\e... | 5 | [
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-0.0314941... | 37,185 | 37185 | |
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Topic: "Sun Light" It's True Speed
Replies: 0
"Sun Li... | 4 | [
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Find exactly one solution
October 1st 2012, 06:14 AM
nivek0078
Find exactly one solution
I'm confussed on how to solve this because of the constants a for the given value of s.
Given:
x1 + 0x2 + x3 = a
5x1 + (s-1)x2 + 3x3 = a
sx1 + 0x2 + 4x3 = 1
Find what value of s does the system have on s... | 5 | [
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-0.0141... | 37,187 | 37187 | |
Permutation checking and Inclusion-Exclusion
February 2nd 2008, 11:55 AM
Deadstar
Permutation checking and Inclusion-Exclusion
Firstly i was wondering whether someone could check if ive done this right...
Suppose f is the permutation (1, 2, 3, 4)(5, 6, 7)(8, 9)(10) of the set X = {1, 2, . . . , 10} and let ... | 4 | [
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IJCNC020405
International Journal of Computer Networks & Communications (IJCNC), Vol.2, No.4, July 2010
DELAY-POWER PERFORMANCE
COMPARISON OF MULTIPLIERS IN VLSI
CIRCUIT DESIGN
Sumit Vaidya1 and Deepak Dandekar2
... | 5 | [
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Isodiametric Inequality
up vote 2 down vote favorite
1
I was reading the proof of Isodiametric inequality in the book by Evans and Gariepy. As a remark they said that the set, say A, is not necessarily contained in a ball of diameter diamA. I thought
every set has to be contained in a ball of radius the diam of the se... | 4 | [
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disjoint subsets of a finite metric space of fixed size and fixed diameter
up vote 2 down vote favorite
I have encountered this question as a part of some other research. The problem appears to be a combinatorial problem. But my knowledge of results in combinatorics and discrete math is quite thin. I
was hoping someon... | 5 | [
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Find the intersection of the line and plane
December 12th 2006, 07:40 PM
Jenny20
Find the intersection of the line and plane
question
a) Determine whether the line
x=3+8t
y=4+5t
z=-3-t
is parallel to the plane x-3y+5z =12.
Note: I know how to solve part a) - the answer is the line and pl... | 4 | [
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Give Me A Lever
August 5, 2011
The role of levers in finding mathematical proofs
Archimedes of Syracuse (c. 287 BC to c. 212 BC) was a Greek mathematician, whose insights led him to many inventions and practical ideas, and to work in physics and astronomy.
Today I wish to talk about the mathematical equivalent of ... | 4 | [
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Equation of Tangent Line
Find the equation of the tangent line to the graph of y= 5e^x(x^2+x-1)^(-x) at the point where x=1
is that meant to read $y= 5e^x (x^2+x-1)^{-x}$ in any case get what $y$ would be by substituting in $x=1$ then get $dy/dx$ of the original $y= 5e^x (x^2+x-1)^(-x)$ and then use the equation of a ... | 4 | [
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-0.0400390625,
-0.036132812... | 37,194 | 37194 | |
Help with optimization of a box
November 29th 2008, 10:25 AM #1
Member
Joined
Jun 2008
Posts
105
Help with optimization of a box
Concrete costs $15 per square meter, and glass costs $100 per square meter. If the volume of the pool must be 1000 cubic meters, what should the dimensions be to minimize the c... | 5 | [
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Is there a known formula for fractional derivative of cot x?
up vote 6 down vote favorite
2
I wonder if there any established formula for fractional derivative of a function $\pi \cot (\pi x)$.
I derived the following expression:
$(\pi \cot (\pi q))^{(p)}=-\frac{\zeta'(p+1,q)+(\psi(-p)+\gamma ) \zeta (p+1,q)}{\Gamma... | 5 | [
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Yucky Calculus stuff - please help
November 29th 2006, 05:17 PM
sugar_babee
Yucky Calculus stuff - please help
Okay, I have 2 questions that I can't figure out...I've manipulated them in so many ways, but it just doesn't seem like i'm doing it right, can someone please show me how they should be answered.
1... | 5 | [
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Comparison principle for inhomogeneous heat equation
October 8th 2013, 03:55 PM #1
Comparison principle for inhomogeneous heat equation
I just finished this problem:
"Prove the comparison principle for the diffusion equation: If u and v are
two solutions, and if u ≤ v for t = 0, for x = 0, and for x = l, ... | 5 | [
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Integral Problems
Date: 9/14/95 at 7:15:15
From: Filiberto Strazzari
Subject: Generalized Integrals
Let's consider the function
1
f(x) = -----------------
x^h * (log x)^k
For what real values of h and k does
infinite 1
/ /
... | 5 | [
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... | 37,199 | 37199 |