content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
st: re: interaction of column matrix
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st: re: interaction of column matrix
From Kit Baum <kitbaum@mac.com>
To statalist@hsphsun2.harvard.edu
Subject st: re: interaction of column matrix
Date Fri, 19 Oct 2007 06:58:26 -0400
Abdel wrot... | 4 | [
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Multi-step inequalities
Multi-step inequalities are solved in exactly the same way as are one step inequalities or two step inequalities. The only difference between them is the number of steps you have to perform in order
to get to the solution. Since the number of steps in multi-step inequalities is not limited, the... | 4 | [
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James Gregory and the Pappus-Guldin Theorem - More on the Trunk and the Cylinder
If AB and EF are two planar figures with centers of gravity a and e, respectively, and which generate cylinders with the same height, we saw previously that
{ rev(AB) \over rev(EF)} = { trunk(AB) \over trunk(EF)} { circum(AB) \over circum... | 4 | [
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Sect
fraction common divisor denominator numerator quantity
SECT. III.-FRA.CTIONS.
In any fraction the upper number, or the dividend, is called the numerator, and the lower number or divisor is called the denominator. Thus, in the fractioq, a is the numerator, and S the
denominator.
If the numerator be less than th... | 5 | [
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Aggregate Clause (Visual Basic)
Applies one or more aggregate functions to a collection.
Aggregate element [As type] In collection _
[, element2 [As type2] In collection2, [...]]
[ clause ]
Into expressionList
Term Definition
element Required. Variable used to iterate through the elements of ... | 5 | [
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Networked Estimation for Event-Based Sampling Systems with Packet Dropouts
Open Access This article is
• freely available
• re-usable
Article
Networked Estimation for Event-Based Sampling Systems with Packet Dropouts
Department of Electrical Engineering, University of Ulsan, Namgu, Ulsan 680-749, Korea; E-Mail:... | 4 | [
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FIR Filters by Windowing
The design of FIR filters using windowing is a simple and quick technique. There are many pages on the web that describe the process, but many fall short on providing real implementation details.
Hopefully, this page contains all the required information to put together your own algorithm for ... | 4 | [
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Roots and the IVT
June 17th 2013, 05:50 PM #1
Member
Joined
Jun 2012
From
Georgia
Posts
176
Thanks
22
Roots and the IVT
Here is the question:
a_0 + a_1/2 + ... + a_n/(n+1) = 0, all a's are real.
Show that at least one real root betw. 0 and 1 exists for a_0 + a_1*x + ... + a_n*x^n = 0.
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Mathematical Induction
Mathematical Induction is a special way of proving things. It has only 2 steps:
• Step 1. Show it is true for the first one
• Step 2. Show that if any one is true then the next one is true
Then all will... | 4 | [
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Question on Quadratic Application
A parabola whose equation is y=x2-2x+k has a turning point with coordinates (1,-5). Find the value of K
y = x^2 - 2x + k = x^2 - 2x + (-2/2)^2 - (-2/2)^2 + k = x^2 - 2x + 1 - 1 + k = (x^2 - 2x + 1) + (k - 1) = (x - 1)^2 + (k - 1) = (x - H)^2 + (K) where (H,K) is the turning point = (1... | 4 | [
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Ma
RootFinding[Parametric][CellDecomposition] - decompose parameter space into open cells
Calling Sequence
CellDecomposition(sys, vars, pars, options)
CellDecomposition(eqs, posineqs, vars, pars, options)
CellDecomposition(eqs, posineqs, nzineqs, vars, pars, options)
Parameters
sys - list of equati... | 5 | [
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Out of Memory
"Jan Simon" <matlab.THIS_YEAR@nMINUSsimon.de> wrote in message <hb7fje$d2q$1@fred.mathworks.com>...
> Dear Isaac!
>
> > M=matrix(100,1000);
> > for j=1:100
> > a = functionA(M(j,:))
> > b(j) = functionB(M(j,:))
> > end
> >
> > it seems the execution of theese functions destroy free memory :(
>
> Since the... | 4 | [
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Joint Probability density
January 24th 2009, 10:30 AM #1
Member
Joined
May 2008
Posts
103
Joint Probability density
Suppose that P, the price of a certain commodity (in dollars), and S, its total sales (in 10,000 units), are random variables whose joint probability distribution can be approximated closel... | 4 | [
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Box optimization L, W, H, and domain
November 16th 2009, 10:46 AM
mybrohshi5
Box optimization L, W, H, and domain
A box is to be made out of a 12 cm by 18 cm piece of cardboard. Squares of side length http://webwork.asu.edu/webwork2_file...dd0b8b8e91.png cm will be cut out of each corner, and then the ends
a... | 4 | [
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1 + 1 = 2? Prove!
October 2nd 2013, 03:55 AM #1
1 + 1 = 2? Prove!
Hey there, good day. Just wondering if we can prove this in a more complicated way. Our teacher once asked this in our class and I responded "Sir, we should not prove the obvious!" But i guess he
wasn't contented. So, how should we attack this?... | 4 | [
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Change of Variables
Sometimes "changing a variable" can help you solve an equation.
The Idea: If you can't solve it here, then move somewhere else where you can solve it, and then move back to the original position.
Like this:
... | 4 | [
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Newton Method, to solve nonlinear equations, in Matlab
January 17th 2009, 01:31 AM #1
Newbie
Joined
Jan 2009
Posts
1
Newton Method, to solve nonlinear equations, in Matlab
I have a set of nonlinear equations. And it was proved to have a unique solution. But I can't get the result by using matlab. I thoug... | 5 | [
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Can any body explain me this solution of Rayleigh distribution question
The question and solution is attached Kindly eloborate the solution
Since you wanted at leats one comment :) We are doing this now in class! Well, I can tell you what they are doing generally but I would have to look into it a little more. This i... | 4 | [
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Maths
3D Maths for CG
Index
Vectors
Cross Product
Dot Product
Vector Projection
Lines Rays and Planes
Lines and Rays
Planes
Intersection
Ray Sphere Intersecion
Ray Triangle Intersection
Interpolation
Catmull-Rom Spline
OpenGLTutorials @ Lighthouse3d.com
Led Shader
View Frustum Culling
GLSL Tutorial
Maths Tut... | 4 | [
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Partial fraction question
November 20th 2009, 06:43 AM
shadow85
Partial fraction question
I need help solving:
integral of (20x-30) / (x(x-2)(x^2-2x+5))
If I try to decompose it;
I will have
LHS from above = (A/x)+(B/x-2) + ?
Stuck here.
November 20th 2009, 06:50 AM
lvleph
You can... | 5 | [
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.
Annu. Rev. Astron. Astrophys. 1982. 20: 399-429
Copyright © 1982 by Annual Reviews. All rights reserved
3. RADIAL STRUCTURE OF SPHEROIDAL COMPONENTS
The variation of mass density, luminosity density, and velocity dispersion as a function of radius are most easily discussed in terms of spherical models. These... | 4 | [
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umber
The number theory is a one of the main branches of math. The number theory is pure mathematics. The number theory consists of numbers, that is, whole numbers or rational numbers or fractions. Prime
number and prime factorization are very important in the number theory. The number theory proofs are given below.
... | 4 | [
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Probability | Aptitude Test Problems | Lofoya
Probability Online Practice Questions :Aptitude Questions
ABOUT THE PAGE
PageInfo
This Aptitude Test Questions sections presents "Probability" solved problems. Probability Questions are provided with detailed answers to every question.
Online practice of these simple ... | 4 | [
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Monoidal instances for pipes
In this post, I’m going to introduce a new class of combinators for pipes, with an interesting categorical interpretation. I will be using the pipe implementation of my previous post.
> {-# LANGUAGE MultiParamTypeClasses #-}
> {-# LANGUAGE FlexibleInstances #-}
> {-# LANGUAGE TypeFamilies ... | 4 | [
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Least Common Multiple
The least common multiple (LCM) of a set of numbers is the smallest number that each of the original numbers is a factor of. Another way to say this is that the least common multiple of a numbers is
the smallest number that can be divided evenly by all the numbers we are trying to find the LCM for... | 4 | [
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Math Forums @ Math Goodiestesting headertesting left navtesting footer
Math Goodies is a free math help portal for students, teachers, and parents.
... | 5 | [
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Need help: Find for the values....
August 25th 2009, 07:08 PM
Ah Chan
Need help: Find for the values....
Hi, everyone..I'm a new recruit and just joined this forum several weeks ago. So, hope u all can help me through every difficulties I face..yeah, this is my first ever question and I hope there's
somebody... | 4 | [
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... | 4,526 | 4526 | |
imization
Sets of equations
Finding a root of a set of non-linear equations can be achieve using the root function. Several methods are available, amongst which hybr (the default) and lm which respectively use the hybrid method
of Powell and the Levenberg-Marquardt method from MINPACK.
The following example consider... | 5 | [
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Re-Arraning!!!!
Member
Registered: 2006-03-12
Posts: 1,306
Re: Re-Arraning!!!!
Member
Registered: 2006-02-20
Posts: 3
Re-Arraning!!!!
Ok i know it might be very simple for some people out here, but i am struggling with it:
I need to re-arrange the following formula in way so i can get Ns on... | 4 | [
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A Political Redistricting Tool for the Rest of Us - Sweepcircle Redistricting
Sweepcircle Redistricting
To improve the compactness of the regions in equal population partitions, we start with the most compact geometric shape-the circle. In this scheme, now considering Washington state with its current
10 congressional... | 4 | [
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DIY DECOMPRESSION
By Stuart Morrison
(c) 2000 Stuart Morris... | 4 | [
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25. Elevations and Fibre Products
Last time:
Lemma 24: Fix basepoints $x,y,y' \in X,Y,Y'$ as usual. There is a lift $f':X'\rightarrow Y'$ of $f:X\rightarrow Y$ such that $f(x)=y'$ if and only if
$f_*\pi_1(X,x) \subseteq \pi_1(Y',y')$.
Furthermore, if the lift exists, it is unique.
Lemma 25: Given a choice of $y'$, t... | 4 | [
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Problem Solving Select Many GRE Sample Questions
Problem Solving Select Many GRE Sample Questions 6
GRE Problem Solving Select Many Sample Questions
GRE Problem Solving Select Many Sample Questions 1 | GRE Problem Solving Select Many Sam... | 4 | [
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Integration of dx/[(1-2x)^2*(3-x)]
March 17th 2009, 12:03 AM
gnameni
Integration of dx/[(1-2x)^2*(3-x)]
I have attempted to solve this integration problem by parts but I have not been able to arrive at the final answer. Can anyone help?
Problem: integration of dx/[(1-2x)^2*(3-x)]
Answer: 1/[5*(1-2x)]... | 5 | [
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... | 4,533 | 4533 | |
Solving Systems of Linear Equations by Addition
When we have two equations, we can add them together to get a new equation. We don't even need to ask for their consent. If
a = b
and
c = d,
we can add the left-hand sides of the equations and the right-hand sides of the equations to get
a + c = b + d.
When we do th... | 4 | [
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0.... | 4,534 | 4534 | |
Theorem 3.4
Theorem 3.4: (Pythagoras) Let f d, and r be the three sides of a triangle.
The triangle is a right triangle if and only if
a^2 + f^2 = r^2
Proof: If the lines determined by OF and FA are horizontal or vertical, th... | 4 | [
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Pololu - 6. Cyclic Redundancy Check (CRC) Error Detection
For certain applications, verifying the integrity of the data you’re sending and receiving can be very important. Because of this, the qik has optional 7-bit cyclic redundancy checking, which is
similar to a checksum but more robust as it can detect errors that ... | 4 | [
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Extracting Square Roots Made Easy: A Little Known Medieval Method - A Close Connection Between Our Square Roots and the Pell Equation
There is a very intimate relation between the approximations of square roots and the Pell equation. Thus the ancient and medieval Indian approximations for \(\sqrt{2},\) namely \(\frac{1... | 5 | [
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... | 4,537 | 4537 | |
GMAT
If x is not equal to 0, is |x| less than 1?
(1) x / |x| < x
(2) |x| > x
The explaination given in the answers is below
------------------------------------------------------------------------------------------------------
The question "Is |x| less than 1?" can be rephrased in the following way.
Case 1: If x... | 4 | [
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-0.107910... | 4,538 | 4538 | |
Implicit Differentiation
How can I 'evaluate' the following derivative and simplify it ? xy^2 = 3^(y/ln x) + sin^2 x
I assume you are taking the derivative with respect to x? If so you need to use the chain rule, i.e. $\frac{d}{dx} (f\circ g)(x) = (f'\circ g)(x)\cdot g'(x)$. To start you off $\frac{d}{dx}\left[xy^2
\r... | 5 | [
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0.076660... | 4,539 | 4539 | |
proof of two cross products.
February 23rd 2009, 09:24 PM
rcmango
proof of two cross products.
just wanted to see 2 proofs if anyone knows them or where I can point my browser to see them please,
just proofs for these cross products where a and b are vectors and c is scalar.
just a x b = -b x a
an... | 5 | [
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0.0356... | 4,540 | 4540 | |
Sum of squares?
August 24th 2008, 08:24 AM #1
Junior Member
Joined
Nov 2007
Posts
57
Sum of squares?
Can someone please help me in solving this problem?
[(1+t)^3 +3(1+t)^2 +2(1+t)] -6
(1+t) -1
So I know the sum a cube gives me (1+t)(1-t+t^2) for the first part of the problem, right?
I a... | 4 | [
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0.021118164... | 4,541 | 4541 | |
IntroductionApplication of SVM in Machine Fault DiagnosisPrinciple of SVMFeature vector analysis of wavelet packets energyWavelet Lifting SchemeFundamental Ideas of RBR Diagnostic StrategyFuzzy reasoning mechanism of typical faults in RBRExamples of DiagnosisSVM estimationWavelet lifting analysisRule-based Reasoning an... | 4 | [
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0.0224609375,
0.02587890625,
-0.0673828125,
-0.054931640625,
-0.028564453125,
-0.00482177734375,
-... | 4,542 | 4542 | |
Operator method help
May 3rd 2010, 09:19 AM
Mist
Operator method help
im trying to solve a system of differential equations of (x''(t ) + 5(x(t )) - 2y(t ) = 0
and, -2*x(t ) + y''(t ) +2*y(t ) = 0
but I keep getting the wrong answer..
May 3rd 2010, 10:43 AM
Opalg
Quote:
Here's an outline of... | 5 | [
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-0.072... | 4,543 | 4543 | |
countably many intersection of sets
How would you rigorously show $\cap_{n=1}^{\infty}[a-\frac{1}{n},\infty)= (a,\infty)$ for each $a\in\mathbb{R}$
Clearly $[a,\infty)\subseteq \left[a-\tfrac{1}{n},\infty\right),\text{ }\forall n\in\mathbb{N}$. Now, suppose that $b<a\in\bigcap_{n=1}^{\infty}\left[a-\tfrac{1}{n},\infty... | 5 | [
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-0.1... | 4,544 | 4544 | |
Volume of a Pyramid Lesson Plans & Worksheets | Lesson Planet
Volume of a Pyramid Teacher Resources
Find Volume of a Pyramid educational ideas and activities
Showing 1 - 20 of 77 resources
Students identify nets and calculate the volume of a pyramid. In this geometry lesson, students draw nets of pyramids and calcul... | 4 | [
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-0.00323486328125,
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0.... | 4,545 | 4545 | |
Transformations Lesson Plans & Worksheets | Lesson Planet
Transformations Teacher Resources
Find Transformations educational ideas and activities
Showing 1 - 20 of 811 resources
Learners work in cooperative groups to manipulate a figure on the computer to demonstrate different types of geometric transformations. The... | 4 | [
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0.0306396484375,
0.000652313232421875,
0.00958251953125,
-0.08154296875,
... | 4,546 | 4546 | |
probability distribution of hitting nodes on a finite graph random walk
up vote 2 down vote favorite
Consider a finite, undirected, scale-free graph $\{G}$, with uniform edge weights. We define a truncated random walk on $\{G}$ as a random walk that continues for exactly $\{k}$ steps. For an
arbitrary truncated random... | 4 | [
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0.0... | 4,547 | 4547 | |
IntroductionRelated WorkClassificationOne-Class SVMLeast Squares One-Class SVMOnline Least Squares One-Class SVMSparse Online Least Squares One-Class SVMCovariance Descriptor of Frame BehaviorAbnormal Event DetectionOnline LS-OC-SVM StrategySparse Online LS-OC-SVM StrategyAbnormal Event Detection ResultsSynthetic Datas... | 4 | [
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0.038330078125,
0.07568359375,
-0.00384521484375,
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0.021728515625,
0.023193359375,
-0.08251953125,
-0.04296875,
0.0830078125,
0.013671875,
... | 4,548 | 4548 | |
Regularization by truncated total least squares
Publication: Research - peer-review › Journal article – Annual report year: 1997
Standard
Harvard
Hansen, PC
, Fierro, RD, Golub, GH & O'Leary, DP 1997, '
Regularization by truncated total least squares
'
SIAM J. Sci. Comput
, vol 18, no. 4, pp. 1223-1241.
APA
C... | 4 | [
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0.06787109375,
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0.006439208984375,
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-0.0... | 4,549 | 4549 | |
Estimating the Payback Period of Additional Insulation
Adding insulation in the attic of an existing home often results in a favorable payback. | Photo courtesy of Lieko Earle, NREL PIX 19612.
Use the equation below to estimate the cost effectiveness of adding insulation in terms of the "years to payback" for savings ... | 5 | [
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0.0625,
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0.087890625,
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-0.0625,
-0.07470703125,
0.0458984375,
-0.... | 4,550 | 4550 | |
Locus coordinates
January 16th 2010, 11:30 AM #1
Member
Joined
Oct 2008
Posts
157
Locus coordinates
The complex numbers w and z is represented by P (x , y) and Q (u, v) on argand diagrams and
$w=z^2$
P moves along the line $y=x-1$. Find the cartesian equation of the locus of Q.
I got expre... | 4 | [
-0.044189453125,
0.036865234375,
0.0206298828125,
0.0191650390625,
0.039306640625,
0.033203125,
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0.0240478515625,
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0.06787109375,
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0.046630859375,
-0.09423828125,
0.005279541015625,
-0.044921875,
... | 4,551 | 4551 | |
dot product verification
is the dot product of (a+b) . (a + b) = a^2 + b^2 + 2ab ?
That is more or less correct! But it should be written as $\left( {a + b} \right) \cdot \left( {a + b} \right) = a \cdot a + 2a \cdot b + b \cdot b$. Please note that the ‘dot products’ in the
answer. In fact here is an important form: ... | 4 | [
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0.050537109375,
-0.0118408203125,
0.018676757... | 4,552 | 4552 | |
quadratic equation w/absoulute values
interesting ... $|2x-1| = 3-x^2$ since $|2x-1| \geq 0$ , $-\sqrt{3} \leq x \leq \sqrt{3}$ case 1 ... $2x-1 = 3-x^2$ $x^2+2x-4 = 0$ $x^2+ 2x + 1 - 5 = 0$ $(x + 1)^2 - 5 = 0$ $x+1 = \pm \sqrt{5}$ $x =
-1 \pm \sqrt{5}$ one solution works ... $x = -1 + \sqrt{5}$ case 2 ... $2x-1 = -(3 ... | 4 | [
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0.07763671875,
0.047119140625,
-0.0654296875,
0.011962890625,
0.04345703125,
-0.... | 4,553 | 4553 | |
Is V in Span(S)
March 22nd 2013, 09:25 PM #1
Newbie
Joined
Mar 2013
From
Brisbane
Posts
23
Is V in Span(S)
Hey,
I have a question that I'm not sure how to approach at all. The question is:
Let
S={[[-1],[2],[1]] , [[3],[1],[2]] , [[1],[5],[4]] , [[-6],[5],[1]]}
and
v=[[-5],[3]... | 5 | [
-0.058349609375,
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0.0791015625,
0.06494140625,
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-0.09326171875,
-0.0654296875,
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-0.042236328125,
-0.00537109375,
0.0191650390625,
-0.04541015625,
-0.068359375,
-0.05078125,
0.0201416015625,
0.000633... | 4,554 | 4554 | |
elasticity of demand
November 9th 2010, 04:26 PM #1
Junior Member
Joined
Sep 2010
Posts
41
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 u... | 5 | [
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0.03857421875,
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0.054931640625,
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0.06982421875,
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0.051513671875,
0.04541015625,
-0.0078125,
-0.034912109375,
-0.021484375,
-0.026611328125,
... | 4,555 | 4555 | |
Re
Regression--treatments from an otherwise continuous range of values applied to a CRD.
Note: this is a simple arrangement of treatments that could be found in almost any other experimental design. See arrangements versus design.
Field marks:
• Treatments are specific quantities from an otherwise continuous ra... | 4 | [
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0.024169921875,
0.01556396484375,
-0.011962890625,
-0.02734375,
0.11474609375,
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0.0125732421875,
0.025634765625,
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0.02734375,
0.03662109375,
0.035888671875,
-0.036865234375,
0.018310546875,
0.0869140625,
-0.0168457031... | 4,556 | 4556 | |
Haskell: Closest Pairs Algorithm
As I mentioned in a post a couple of days ago I’ve been writing the closest pairs algorithm in Haskell and while the brute force version works for small numbers of pairs it starts to fall apart as
the number of pairs increases:
time ./closest_pairs 100 bf
./closest_pairs 100 bf 0.01s ... | 4 | [
-0.03662109375,
0.046142578125,
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0.020751953125,
-0.0223388671875,
0.01324462890625,
0.04052734375,
0.00347900... | 4,557 | 4557 | |
The Truncation Map |_| : ℕ -> ‖ℕ‖ is nearly Invertible
Magic tricks are often entertaining, sometimes boring, and in some rarer cases astonishing. For me, the following trick belongs to the third type: the magician asks a volunteer in the audience to
think of a natural number. The volunteer secretly chooses a number n... | 4 | [
0.0013427734375,
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-0.0556640625,
-0.011474609375,
-0.025390625,
0.002899169921875,
-0.03... | 4,558 | 4558 | |
Ford circle
From Wikipedia, the free encyclopedia
In mathematics, a Ford circle is a circle with centre at (p/q, 1/(2q^ 2)) and radius 1/(2q^ 2), where p/q is an irreducible fraction, i.e. p and q are coprime integers. Each Ford circle is tangent to
the horizontal axis y = 0.
History
Ford circles are a special case ... | 4 | [
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... | 4,559 | 4559 | |
Challenge Integral
Okay, following from the hint, here is the solution: \displaystyle \begin{aligned} I_{n} & = \int_{0}^{a}\frac{x^n+b}{x^n+(a-x)^n+2b}\;{dx} \\& = \int_{0}^{a}\frac{(a-x)^n+b}{(a-x)^n+x^n+2b}\;{dx} \\
& = \frac{1}{2}\int_{0}^{a}\frac{x^n+(a-x)^n+2b}{x^n+(a-x)^n+2b}\;{dx} \\& = \frac{1}{2}~a.\end{align... | 5 | [
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-0.001... | 4,560 | 4560 | |
The central amenability constant of a finite group: Part 1 of n
6 May, 2013
Update 06/06/2013: see the bottom of the post (some typos also fixed)
As I am currently too besieged by a jumped-up virus to get any proper work done, I suppose I might as well put this blog to one of its nominal uses and actually talk about... | 4 | [
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... | 4,561 | 4561 | |
13.2 Linear vs. Nonlinear Systems
Video
Textbook
Download PDFs
Additional Resources
13.2 Linear vs. Nonlinear Systems
LINEAR VS. NONLINEAR
• Chaos is one of many behaviors that a nonlinear system can display.
Chaos theory is an often-misunderstood field of mathematics. Many people associate chaos mathematics with... | 4 | [
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0.005126953125,
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-0.014... | 4,562 | 4562 | |
MathGroup Archive: October 1997 [00221]
[Date Index] [Thread Index] [Author Index]
Re: Help with findroot
• To: mathgroup at smc.vnet.net
• Subject: [mg9202] Re: [mg9169] Help with findroot
• From: seanross at worldnet.att.net
• Dat... | 5 | [
-0.049560546875,
-0.0634765625,
-0.01031494140625,
0.076171875,
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0.0380859375,
0.0247802734375,
0.0037689208984375,
0.111328125,
-0.021728515625,
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0.08251953125,
0.034423828125,
0.054931640625,
-0.054931640625,
-0.0771... | 4,563 | 4563 | |
Linear operators and Differential Equations
October 24th 2009, 01:49 AM #1
Member
Joined
Feb 2008
Posts
184
Linear operators and Differential Equations
Hello,
I have missed all my lectures on the above topic due to illness. Does anyone know of a good website with solved excercise sheets to help me l... | 5 | [
-0.0322265625,
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0.057373046875,
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0.0... | 4,564 | 4564 | |
Math Help
October 15th 2009, 10:24 PM #1
Member
Joined
Jun 2009
Posts
77
hexAGON
there is a hexagon of vertices A,B,C,D,E,F inscribed in a circle of unit radius
what will be the product of line segments AB,AC,AE
I've done a quick drawing in paint just to illustrate my solution.. Its a pretty cr... | 4 | [
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0.0498046875,
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0.0234375,
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0.046875,
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0.00335693359375,
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-0.0908203125,
-0.08154296875,
-0.13671... | 4,565 | 4565 | |
Surface Area Problem.
November 30th 2010, 12:11 PM #1
Member
Joined
Nov 2010
Posts
102
Surface Area Problem.
In a beehive, each cell is a regular hexagonal prism, open at one end with a trihedral angle at the other end. It is believed that bees form their cells in such a way as to minimize the surface
... | 5 | [
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0.02490... | 4,566 | 4566 | |
Could I get some help with finding the area of a region?
March 30th 2009, 04:55 PM
Meeklo Braca
Could I get some help with finding the area of a region?
The question reads:
Evaluate the area of the region bounded by y=sec^2x and y = 4 between x = -pi/3 and x = pi/3.
Thank You!
March 30th 2009, 05:06 P... | 5 | [
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0.031494140625,
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-0.053... | 4,567 | 4567 | |
Gravity Worksheet
If you go from the Earth to live on the Moon you would have the same mass, but your weight would be different. This is because the force of gravity changes depending on which planet you are on. On
the Earth the... | 4 | [
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0... | 4,568 | 4568 | |
High School Mathematics-Physics SMILE Meeting
19 March 2002
Notes Prepared by Porter Johnson
Ann Brandon (Joliet West HS Physics) -- Static Electricity with Ping-pong Balls
Ann held up two ping-pong balls for us to see. They had been painted in "copper print", a conducting paint once extensively used for repairing pri... | 5 | [
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0.01202392578125,
-0.043701171... | 4,569 | 4569 | |
Calculating Important Parameters in Leaf Gas Exchange
Topic 9.4
Calculating Important Parameters in Leaf Gas Exchange
Evaporation (E) can be defined using Fick’s law (see textbook Chapter 3):
where E is the evaporation rate; e[i] and e[a] are the partial pressures of water inside the leaf and in the ambient air, res... | 5 | [
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0.033935546875,
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0.0673828125,
-... | 4,570 | 4570 | |
Bouncing ball experiment
In this experiment students should be in groups of 3. Students will drop a ball from different heights and measure the corresponding bounce. Since each group will use a different ball, they will
generate different sets of data. They will be asked to discuss and compare their linear function wi... | 4 | [
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0.07958984375,
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0.051025390625,
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0... | 4,571 | 4571 | |
Math Forum Discussions - Re: Generalizing Orthogonal Projection
Date: Jan 22, 2013 3:21 AM
Author: Kaba
Subject: Re: Generalizing Orthogonal Projection
22.1.2013 7:47, hbertaz@gmail.com wrote:
> If L is a 1-D subspace of R^3, and q=(x,y,z) is a point not on L. Can we
> define the orthogonal projection of q into L, ... | 5 | [
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-0.01409912109375,
0.046630859375,
-0.08154296875,
-0.02844238281... | 4,572 | 4572 | |
Capacitor Calculator
Cylindrical Capacitor refers to a capacitor that is made up of two concentric metal cylinders of the same length, with dielectric filling the space between the cylinders. The cylindrical capacitor is
also known as coaxial capacitor.
Capacitance :
C = 2π εL/In( b/a)
Permittivity :
ε = Cln (b/a)/... | 4 | [
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0.029541015625,
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-0.056640625,
-0.0289306640625... | 4,573 | 4573 | |
MathGroup Archive: December 2007 [00171]
[Date Index] [Thread Index] [Author Index]
Re: Re: different eigenvectors
• To: mathgroup at smc.vnet.net
• Subject: [mg83945] Re: [mg83910] Re: different eigenvectors
• From: "Jean-Marc Gullie... | 5 | [
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-0.01470947265625... | 4,574 | 4574 | |
Large Bore Orifice Flowmeter for Liquids
┌────────────────────────────────────────────────────────────┬──────────────────────────────────────────────────────────────┐
│ │ For pipe diameter > 5 cm. │
│Large Diameter Orifice Flo... | 4 | [
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-0.04589843... | 4,575 | 4575 | |
Find general solution
July 16th 2009, 12:29 AM #1
Senior Member
Joined
Jul 2009
From
Singapore
Posts
338
Find general solution
Find the general solution of the equation:
$10 \sin \frac{\pi x}{3}+24 \cos \frac{\pi x}{3}=13$
My attempt:
I used the identity $R (\sin \theta \cos \alpha+\cos ... | 5 | [
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0.02880859375,
-0.003... | 4,576 | 4576 | |
What is this modular arithmetic question asking exactly?
November 11th 2011, 08:50 PM #1
Member
Joined
Jul 2011
Posts
196
What is this modular arithmetic question asking exactly?
I just completed the first two parts of a question and am not sure how to use my answers in part c).
a) Write down an int... | 4 | [
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-0.054931... | 4,577 | 4577 | |
MTH 207 Lab Lesson 11
Exponential Functions
Up to Main Lab Page Next Lesson - Finding Roots... | 5 | [
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Bending Stress Solved Examples Help for Bending Stress - Transtutors
Solved Examples Based On Bending Stress
Example: A beam made of C.I. having a section of 50 mm external diameter and 25 mm internal diameter is supported at two points 4 m apart. The beam carries a concentrated load of 100 N at its centre.
Find the m... | 5 | [
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-0.0380859375,
0.14453125,
-0.00180816650... | 4,579 | 4579 | |
Weak partitioning vs. strong partitioning
up vote -3 down vote favorite
Let $U$ is a complete lattice with least element 0.
Weak partitioning is a collection $S$ of nonempty subsets of $U$ such that $\forall x\in S: x\cap\bigcup(S\setminus\{x\})=0$.
Strong partitioning is a collection $S$ of nonempty subsets of $U$ ... | 4 | [
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-0.01574... | 4,580 | 4580 | |
A COMET'S TALE
---===( A COMET'S TALE )===---
Credit: Comet Halley as taken March 8, 1986 by W. Liller, Easter Island.
I. INTRODUCTION
Halley’s Comet is arguably one ... | 4 | [
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0.011840... | 4,581 | 4581 | |
The best way to describe the method is just to give an example.
Let's do it with your one.
6x² - 11x + 3 = 0
The way to solve this is similar to solving ones where the x² coefficient is 1, but instead of finding 2 numbers that add to give -11 and multiply to give 3, we need numbers that add to give -11 and
multiply t... | 4 | [
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-0.02941894... | 4,582 | 4582 | |
ti
Variance, covariance, correlation
This continues our exploration of the semantics of the inner product.
As you doubtless know, the variance of a set of numbers is defined as the "mean squared difference from the mean". The inner product of a vector with itself gives us the sum-of-squares part of this,
so we can ca... | 5 | [
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0.057373046875... | 4,583 | 4583 | |
Re: prevailing recomended torque for machine screws
MadSci Network: Engineering
Date: Tue Aug 22 17:25:12 2000
Posted By: Bradley Kelley, Grad student, Mechanical Engineering, Colorado State University
Area of science: Engineering
ID: ... | 5 | [
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Calculate safety stock with sales forecasting and Microsoft Excel
By Joannès Vermorel, December 2007 (last revised January 2012)
The approach detailed below is a several decades old classic, however recent developments of Lokad around
quantile forecasts
are now making the
safety stock
model somewhat obsolete. Inde... | 4 | [
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lim sin 4x/sin 6x as x approaches zero - Math Central
We have two responses for you
Hi Josh,
The theorem that I am sure you know that needs to be used hers is that the limit of sin(t)/t approaches 1 as t approaches 0. Thus if you had
you could make the variable substitution t = 4x. As x approaches 0 certainly 4x = t... | 5 | [
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Borel measurable function
March 10th 2010, 06:49 PM #1
Junior Member
Joined
Sep 2009
Posts
35
Hi there,
I have a question on real analysis, I will write my try and could you please help me to solve it.
we need to prove that f(x)=X^2 ,Q(x)= tanx, and J(x)= -sqrt(x) are borel measurable by the forma... | 5 | [
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The Astrolabe Project
The next step in drafting the astrolabe is constructing the calendar scale.
Up until now the process of creating scales has been straightforward. The time scale on the front and the altitude and zodiac scales on the back are simple in concept and execution, requiring no math
to draw. The calendar... | 4 | [
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gression (GLORE): building shared models without sharing data
Grid Binary LOgistic REgression (GLORE): building shared models without sharing data
1. Correspondence to Dr Yuan Wu, Division of Biomedical Informatics, Department of Medicine, University of California San Diego, La Jolla, CA 92093, USA; y6wu{at}ucsd.e... | 4 | [
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Generating the Monotone Boolean Functions
The monotone Boolean functions (events) of n variables are those
that can be constructed using only AND and OR operations (without
NOT's). An elementary way of constructing and counting these
functions is to begin with a function of n=0 variables, which
can only have a consta... | 4 | [
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Accumulation point
January 27th 2010, 03:10 PM #1
Newbie
Joined
Jul 2009
Posts
21
Accumulation point
Prove that a real number s is an accumulation point of a set S if and only if there exists some sequence {a} in S such that a is not equal to s for every natural number n where the limit of a as
n app... | 5 | [
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Parametric form of Quasi Linear PDE
December 22nd 2010, 01:49 PM #1
Parametric form of Quasi Linear PDE
Hi,
Could anyone check the attached and see where i have gone wrong on this problem. Asked to find parametric form of pde and hence relationship between u and x,y. The general solution does not match
t... | 5 | [
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-0... | 4,592 | 4592 | |
Math Help
May 31st 2010, 05:47 AM #1
Newbie
Joined
Dec 2009
Posts
11
subfield
Let K be a field an let L be a finite field extension of K.
Let K be a subset of R and R a subset of L, so that for all a,b in R a+b, a*b in R.
Show: R is a subfield of L.
I still have to show the existence of inv... | 4 | [
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statistics % aged less than 24.5 using mean 30 and standard deviation of 3
March 20th 2008, 07:31 PM #1
namethattuneinone
Guest
statistics % aged less than 24.5 using mean 30 and standard deviation of 3
Hi all totally new here. I have not done maths for thirty years and find myself stuck with this one.
The a... | 5 | [
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(Easy?) Boundary Value Problem
February 28th 2011, 11:41 AM #1
Newbie
Joined
Aug 2010
Posts
10
(Easy?) Boundary Value Problem
Hi,
I have to solve a boundary value problem that involves finding function $\varphi$ that is harmonic on an annulus centered at $1+i$ in the plane and takes the value zero o... | 4 | [
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IntroductionAutonomous Navigation Airborne Forward Looking SAR Imaging GeometryAutonomous Navigation Airborne Forward-Looking SAR Echo Signal ModelHigh Precision Imaging with Combination of Pseudo-Polar Formatting and Overlapped Sub-Aperture AlgorithmImaging Results with Real DataConclusionsReferences and NotesFigures ... | 4 | [
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getting started on a relation question
February 9th 2009, 04:32 PM #1
getting started on a relation question
I just need help getting started on this question. the first line (or two) is eluding me:
Let R be a relation on A and suppose that R is symmetric and transitive. Prove thefollowing:
If, for all ... | 4 | [
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Derivatives Lesson Plans & Worksheets :: 101 - 120
Derivatives Teacher Resources
Find Derivatives educational ideas and activities
Showing 101 - 120 of 2,006 resources
Twelfth graders investigate the capabilities of the TI-89. In this calculus lesson, 12th graders explore the parametric equation for a circle, for a... | 4 | [
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... | 4,598 | 4598 | |
Given the integral e^x dx between a & b exists, evaluate it using the formula 1+r+r^2
November 1st 2010, 02:01 PM
gummy_ratz
Given the integral e^x dx between a & b exists, evaluate it using the formula 1+r+r^2
Given the integral e^x dx between a & b exists, evaluate it using the formula 1+r+r^2...r^n = 1 - r^(n... | 5 | [
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