content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
Robust statistics
From Wikipedia, the free encyclopedia
Robust statistics provides an alternative approach to classical statistical methods. The motivation is to produce estimators that are not unduly affected by small departures from model assumptions.
Introduction
Robust statistics seeks to provide methods that em... | 5 | [
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How would I go about doing this?
10-11-2005, 01:07 PM #1
Registered User
Join Date
Sep 2005
Posts
74
How would I go about doing this?
Problem Statement: How many guesses does it take to guess a secret number between 1 and N? For example, take a number between 1 and 100, I'll tell you whether you guess to... | 4 | [
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FEM Applications for Solid Mechanics - PLANE STRESS & PLANE STRAIN
Comments 0
FEM Applications
for Solid Mechanics
PLANE
STRESS & PLANE STRAIN
2D Elements
Based on
Fundamentals of Finite Element Analysis
-
David V. Hutton
PLANE STRESS & PLANE STRAIN 2D Elements
•
INTRODUCTION
–
Equations of Elasticity
–
Pl... | 5 | [
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-... | 3,602 | 3602 | |
How to find the value of sin45 degrees?
April 3rd 2011, 07:42 AM
problady
How to find the value of sin45 degrees?
As far as I know sine has values between 1 and -1 therefore I don't know how to calculate this kind of questions with calculator! Could you help me please...
April 3rd 2011, 07:48 AM
problady
... | 4 | [
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Struggling with quotient rule question
June 7th 2011, 01:40 AM
Turlock
Struggling with quotient rule question
Doing a practise paper question.
My answer to an earlier part for using composite rule on $f(x)=(x^2 -6x+23)^\frac{3}{2 }$
I got $\frac{3}{2 }(x^ -6x+23)^\frac{1}{2 } (2x-6)$
Now I need to... | 4 | [
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What are some important properties of square roots?
Simplifying square roots is often required when you encounter a complicated number underneath the symbol " $\usepackage{color} \definecolor{Myblue}{rgb}{0.27,0.38,0.5} \color{Myblue} \sqrt{}$".
However don’t let that scare you! When you are armed with some importan... | 4 | [
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Inner Product Space and Linear Transformation
November 1st 2008, 03:15 PM
Brokescholar
Inner Product Space and Linear Transformation
Let V be an inner product space, and let w be a fixed vector in V.
Let L:V -> R be defined by L(v) = (v,w) for v in V. Show that L is a linear transformation.
I'm just con... | 4 | [
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and telescope
10.2.1.3. Busack-Honders-Riccardi cameras and telescopes
Much more recent developments in the area of catadioptric dialytes lead into a system that combines exceptional correction level with overall design simplicity. So much so that... | 4 | [
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Sinxtanx - tanx = 0 ; Solve for x?
January 15th 2013, 10:09 PM #1
Newbie
Joined
Jan 2013
From
Canada
Posts
10
Sinxtanx - tanx = 0 ; Solve for x?
Hey everyone!
Sinxtanx - tanx = 0 ; Solve for x? 0 < x < 2pi (and including 0 and 2pi, not sure how to input that)
This is what I have done so far... | 4 | [
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Daily Dose of Excel
If you’ve never used an array formula, you owe it yourself to read Chip Pearson’s page on array formulas. It’s the best explanation that I’ve seen, and it’s how I learned them.
Let’s get under the hood of array formulas. Take this worksheet example:
The formula in G4 finds the total sales for Tom ... | 4 | [
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Variation of Parameters
January 14th 2012, 11:15 AM #1
Newbie
Joined
May 2010
Posts
19
Variation of Parameters
I have a problem understanding a certain step using the Variation of Parameters Method.
take for example
y''+y=sec(x)tan(x)
Auxiliary Equation: mē+1=0 thus m= +/- 1
CF: Y1= A... | 5 | [
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Orthonormal basis
Find an orthonormal basis for the vector subspace of $\mathbb R^3,\,\mathbb W=\{(x,y,z)\in\mathbb R^3|x+y+z=0\}.$ Sketch of work: Spoiler:
first, you don't need to hide your own work! second, you're right so far. now you just need to apply Gram-Schmidt process. let's give a name to the elements of th... | 5 | [
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0.02... | 3,611 | 3611 | |
tit
┌───────────────────────────────────────────────┬───────────────────────┐
│High Energy Relativistic Creation v. Evolution │ │
│ │Source: artludesign.com│
│ by │ │
└───────────────────... | 5 | [
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A fraction fanatical
Can the game of two halves lead to an interest in statistics and data handling? Jon Swain kicks some ideas around
Football matches are played almost every Saturday between mid-August and mid-May, and the results and associated league tables provide a rich source of statistical data for the junior ... | 4 | [
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... | 3,613 | 3613 | |
Complex Analysis - Solutions of the Equation
August 31st 2011, 06:32 PM #1
Member
Joined
Oct 2009
From
United States
Posts
169
Complex Analysis - Solutions of the Equation
I need to find all the solutions of the equation
$z^2-4iz-4-2i=0$.
I know that I can use the quadratic equation and then ... | 5 | [
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Homework Help
Posted by Laquisha on Sunday, October 14, 2012 at 7:05pm.
An indoor physical fitness room consists of a rectangular region with a semicircle on each end. The perimeter of the room is to be a 200-meter running track.
a) Draw a figure that visually represents the problem. Let x and y represent the length ... | 4 | [
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navigation word problem: help
January 22nd 2006, 06:02 AM
mathAna1ys!5
navigation word problem: help
Earth has been charted with vertical and horizontal lines so that points can be named with coordinates. The horizontal lines are called latitude lines. The equator is latitude line 0 degrees.
Parallel lines a... | 4 | [
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Crossovers
--- Crossovers --- Linkwitz/Riley --- Active filters ---
Crossovers
The best crossovers ...
The best electrical crossover filter is one that maintains the acoustic polar response of a loudspeaker throughout the crossover frequency range as output shifts from one driver to the next. The sum
of acoustic lo... | 4 | [
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numpy.polynomial.legendre.legder
numpy.polynomial.legendre.legder¶
numpy.polynomial.legendre.legder(c, m=1, scl=1, axis=0)[source]¶
Differentiate a Legendre series.
Returns the Legendre series coefficients c differentiated m times along axis. At each iteration the result is multiplied by scl (the scaling fac... | 5 | [
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Problem Solving Select Many GRE Sample Questions
Problem Solving Select Many GRE Sample Questions 8
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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9th Grade Math
9th grade Math help is an online tutoring program through which students can learn each Math topic in a thorough manner. This learning program is ideally designed to meet student's educational
requirements. TutorVista provides well-organized online sessions for each academic standard. Moreover, students... | 4 | [
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Theorem 2.4.1: No Square Roots in Q
Proof:
Suppose there was such an
x
. Being a rational number, we can write it as
• x = a / b (with no common divisors)
Since
x^2 = x * x = 2
we have
In other words,
a^2
is even, and therefore
a
must be even as well. (Can you prove this ?). Hence,
• a = 2 c for some ... | 4 | [
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On Klein's icosahedral solution of the quintic
On Klein’s icosahedral solution of the quintic
Icosahedral tiling of the sphere (click to view PDF)
On Klein’s icosahedral solution of the quintic
[EDIT: Post updated in March 2013]
PDFs available
Those interested in the below may wish to consult either:
A solutio... | 4 | [
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Find a formula for serial data
May 2nd 2011, 07:07 AM
dendricala
Find a formula for serial data
Hello
first time here, and to be honest i m here because i need help.
I have a data serie :
100 0.12
200 0.25
300 0.42
400 0.68
500 1.08
600 1.5
700 1.83
800 2.12
900 2.51
... | 4 | [
0.00014972686767578125,
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-0.021728515625,
0.0007476806640625,
-0.01129150390625,
-0.057... | 3,623 | 3623 | |
The Research Kitchen
Frequently we will want to estimate the empirical probability density function of real-world data and compare it to the theoretical density from one or more probability distributions. The following
example shows the empirical and theoretical normal density for EUR/USD high-frequency tick data \(X\)... | 4 | [
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Integration
July 24th 2009, 02:42 PM #1
Integration
$\int{csc2x}dx$
1. I used the identity $csc2x=\frac{1}{2\sin{x}\cos{x}}$
I tried letting $u=\sin{x}$. So
$\frac{1}{2}\int{\frac{1}{u-u^3}}du$.
I need an explanation from top to bottom guys, please.
I'm purposefully trying not to use parti... | 5 | [
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0.0703125,
0.03417968... | 3,625 | 3625 | |
Number of Squares and Rectangles in a Grid
March 8th 2010, 12:11 PM #1
Member
Joined
Dec 2009
Posts
226
Number of Squares and Rectangles in a Grid
I was asked how many squares and rectangles can you find in a 4 x 3 grid? (The squares and rectangles can be constructed from multiple unit squares. For examp... | 5 | [
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0.07177... | 3,626 | 3626 | |
2 Problems involving integrals
December 10th 2010, 10:38 AM
VectorRun
2 Problems involving integrals
Suppose $f(0)=0$ and $\int_0^2{f'(2t)e^{f(2t)}}dt=5$. Find the value of f(4).
So I first recognized that $\frac{1}{2}e^{f(2t)}$ should be the antiderivative of the integral by FTC so that $\frac{1}{2}(e^{f(4... | 5 | [
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Galois Groups of Local Fields
We begin with a few definitions.
Definition 1: A integral domain $R$ is called a Dedekind domain if it is noetherian, every nonzero prime ideal is maximal, and it is integrally closed in its field of fractions.
Definition 2: A ring $R$ is called a discrete valuation ring (DVR) if it is a... | 4 | [
-0.0267333984375,
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0.06298828125,
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0.08544921875,
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0.038818359375,
0.012451171875,
-0.051025390625,
-0.0179443359375,
0.015869140625,
0.015869140625,
0.040771... | 3,628 | 3628 | |
Finding the values of a and b
September 30th 2010, 11:11 PM #1
Hello everyone. This question is apparently unsolvable:
If $x = 3$ or $-4$ are the solutions of the equation $x^2+ax+b=0$, find the values of $a$ and $b$.
The keyword in this irksome question would be the word 'or'. So it denotes that that th... | 4 | [
-0.056884765625,
-0.0419921875,
-0.030029296875,
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0.0078125,
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0.045166015625,
-0.024169921875,
0.07470703125,
-0.030029296875,
0.06689453125,
0.050537109375,
0.037841796875,
0.08642578125,
0.0615234375,
-0.08447265625,
... | 3,629 | 3629 | |
log equation
January 20th 2010, 07:28 AM #1
Super Member
Joined
Sep 2008
Posts
607
log equation
solve for x
$3^{x} e^{7x+2} = 15$
$3^{x} e^{7x} e^{2} = 15$
$3^{x} e^{7x} = \frac{15}{e^{2}}$
$ln (3^{x} e^{7x}) = ln\frac{15}{e^{2}}$
$ln 3^{x} + lne^{7x} = ln\frac{15}{e^{2}}$
$... | 4 | [
-0.05908203125,
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0.06201171875,
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-0.126953125,
0.00144... | 3,630 | 3630 | |
Related Rate HELP
November 3rd 2008, 01:43 PM #1
Newbie
Joined
Nov 2008
Posts
1
Related Rate HELP
I have about 20 related rate problems that I just cannot get a grasp on.
1. A machine is rolling a metal cylinder under pressure. The radius of the cylinder is decreasing at a constant rate of 0.05 inch... | 4 | [
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0.006439208984375,
0.099609375,
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0.05810546875,
0.039306640625,
... | 3,631 | 3631 | |
Urgent Need Of Help!! Please Please Please......
Moderator
Registered: 2005-06-28
Posts: 12,919
Re: Urgent Need Of Help!! Please Please Please......
Member
Registered: 2006-03-18
Posts: 20
Urgent Need Of Help!! Please Please Please......
hi, i know i have asked many questions, i have my mock... | 4 | [
-0.06982421875,
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0.01220703125,
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0.050537109375,
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0.017822265625,
... | 3,632 | 3632 | |
Ph
4.2.1 Dispersion relation
We start with the simplest case of one-atomic linear chain with nearest neighbor interaction (see Fig. 4).
Figure 4. Vibrations of a linear one-atomic chain (displacements).
The nth lattice point is connected with (n-1)th... | 4 | [
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0.047607421... | 3,633 | 3633 | |
Solve for x
i got √50 but its wrong Solve for http://gauss.vaniercollege.qc.ca/web...dd0b8b8e91.png: http://gauss.vaniercollege.qc.ca/web...dd0b8b8e91.png equals b) Solve for http://gauss.vaniercollege.qc.ca/
web...dd0b8b8e91.png: http://gauss.vaniercollege.qc.ca/web...dd0b8b8e91.png equals
Hi wannous I also got x = √... | 4 | [
-0.046142578125,
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0.0380859375,
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0.0279541015625,
-0.1376953125,
-0.0439453125... | 3,634 | 3634 | |
Math Help
March 17th 2008, 04:48 PM #1
Junior Member
Joined
Nov 2007
Posts
33
Algebra
Given two real numbers $x$ and $y$ such that
$(x+y)^2\leq2xy$
find $x+y$.
If $x+y=6$ and $xy=3$, find $\displaystyle\frac{1}{x}+\frac{1}{y}$.
Given $|x-y|=2$ and $|y-z|=7$, find the minimum possible v... | 4 | [
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0.04150390625,
0.022216796875,
-0... | 3,635 | 3635 | |
Simple trigonometry problem
July 21st 2012, 01:13 PM #1
Junior Member
Joined
Jul 2012
From
Who knows anymore
Posts
27
Simple trigonometry problem
Hello, I am new here but I’m not big on many words so I’m just going to go right to the reason i am here.
I am having a small trigonometry problem.
... | 4 | [
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-0.00903320312... | 3,636 | 3636 | |
Homework Help
Posted by Tezuka on Saturday, October 7, 2006 at 1:54pm.
There is a ditch that is 18 feet deep at its deepest point. A rock is dropped from the rim above the deepest point.
a. Write the height of the rock as a function of t in seconds.
b. How long will it take for the rock to hit the ditch floor.
We w... | 4 | [
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0.043945312... | 3,637 | 3637 | |
How do I solve this problem?
December 9th 2008, 09:28 AM #1
Newbie
Joined
Nov 2008
Posts
8
How do I solve this problem?
Solve each equation for x, where 0 ≤ Θ ≤ 2π
cotx csc²x = 2cotx
the answer at the back says: π/4, π/2, 3π/4, 5π/4, 3π/2, or 7π/4
How do I solve this?
Hello, lanvin!
... | 4 | [
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0.01458740... | 3,638 | 3638 | |
Cubic yards of fill dirt - Math Central
Donnie,
The volume is the area of the cross-section times te width of 115 feet. The shape of the cross-section is a trapezoid, a figure bounded by 4 lines, two of which are parallel. The area of a trapezoid
is the average of the lengths of the parallel sides times the distance b... | 4 | [
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0.039794921875,
-... | 3,639 | 3639 | |
Probability
September 20th 2007, 01:29 AM #1
Junior Member
Joined
Jul 2007
Posts
27
Probability
An instructor gives her class a set of 10 porblems with the information that the final exam will consist of a random selection of 5 of them. If a student has figured out how to do 7 of the the
problems, wh... | 4 | [
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-0.02941894531... | 3,640 | 3640 | |
calculus limits
January 31st 2007, 03:08 AM #1
Hi mathsforum
I needed some help with the following:
Find
1. $\lim_{x \to 0} \left\{ \frac{1-2sin^2x-cos^3x}{5x^2}\right\}$
2. $\lim_{x \to 0} \left\{ \frac{x-sinx}{x-tanx}\right\}$
thank you.
This is of the form $\frac{0}{0}$ so we may... | 5 | [
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0.02294921875,
0.050048828125,
0.007171630859375,
0.012878417968... | 3,641 | 3641 | |
Solving equation for x
1. arcsin(3x -pi) = 1/2 2. arcsin rad(2x) = arccos rad(x)
Two things: 1) The argument for arcsin(x) and arccos(x) requires $-1 \le x \le 1$ 2) What does "rad(x)" mean?
1. as mentioned earlier, note that ... $-1 \le 3x-\pi \le 1$ therefore the value of x is restricted to ... $\frac{\pi - 1}{3} \... | 5 | [
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-0.027587890... | 3,642 | 3642 | |
Math Help
May 18th 2009, 08:47 AM #1
Newbie
Joined
May 2009
Posts
10
limits
Hi, okay so I have the following limit:
lim x-->infinity [1+(4/(x-2))]^x
so I don;'t know how to get rid of the power of x...? I am pretty sure that I have to put it into a l'hopitalable form but because of the power o... | 5 | [
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TheManageMentor - Strategic Management - Calculation of Exchange Ratio from the perspective of the acquired and the acquiring firm
Calculation of Exchange Ratio from the perspective of the acquired and the acquiring firm
Whenever a firm ‘A’ acquires another firm ‘B’, the compensation to the shareholders of the acquir... | 4 | [
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0.00... | 3,644 | 3644 | |
Faraday's Law
In the early 1800s, an Englishman named Michael Faraday discovered that a time-varying magnetic field was capable of producing a voltage in an electric circuit. This discovery was an important step
toward the development of electromagnetic theory and Faraday's Law in its various forms continues to be one ... | 5 | [
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0.052490234... | 3,645 | 3645 | |
Data Management in Bioinformatics/Normalization
From Wikibooks, open books for an open world
Functional Dependency (FD)[edit]
Introduction of FD[edit]
┌──────────┬───────┬─────────────┐
│ gene_id │ name │ annotation │
├──────────┼───────┼─────────────┤
│ ... │ ... │ ... │
├──────────┼───────┼──────... | 4 | [
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0.001495... | 3,646 | 3646 | |
Coordinates after rotation ?
11-05-2004, 03:23 AM #1
Coordinates after rotation ?
I have a polygon that is displayed after a rotation. How do I find the new world-view coordinates of that polygon's points after it has been pushed through the rotation matrix?
Thanks a bunch,
Dan
Re: Coordinates after rot... | 4 | [
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0.01318359375,
-0.10693359375,
-0.010... | 3,647 | 3647 | |
Math Help
May 29th 2008, 01:48 PM #1
Newbie
Joined
May 2008
Posts
16
Functions
Using this function, try and answer the question:
f(x)= (x^2 + 2)/(x+4)
Question 1: If f(x)=1/2, what is x? What point(s) are on the graph of f?
Question 2: what is the domain of f?
Question 3: List the x-in... | 4 | [
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0.0361328125,
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0.02490234375,
-0.0218505859375... | 3,648 | 3648 | |
e
How to calculate areas under a function graph.
This topic is part of the TCS FREE high school mathematics 'How-to Library', and will help you to calculate areas under a function graph.
(See the index page for a list of all available topics... | 5 | [
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0.000350952148437... | 3,649 | 3649 | |
Second Order Linear Difference Equations with constant Coefficient - The Homogeneous
January 2nd 2011, 05:38 AM
Gibo
Second Order Linear Difference Equations with constant Coefficient - The Homogeneous
Hi,
I have a problem with part of this example - "Solve the difference equation $u_{n}=2u_{n-1}-2u_{n-2}$, ... | 5 | [
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-0.0... | 3,650 | 3650 | |
Julia, Matlab, and C
Julia is a new language in the same arena as Matlab or R. I’ve had failed attempts to quit the Matlab addiction in the past, making me generally quite conservative about new platforms. However, I’ve
recently been particularly annoyed by Matlab’s slow speed, evil license manager errors, restriction... | 5 | [
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0.005401611328125,
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-0.04150390625,
0.002426147460937... | 3,651 | 3651 | |
PFA: A New Godel's Program & A New Large Cardinal Ladder (Updated)
up vote 5 down vote favorite
2
We know $PFA$ implies $2^{\aleph_0}=\aleph_2$.
Q1. What does $PFA$ say about other values of continuum function? Does proper forcing axiom carry any further information about values of continuum function in other cardina... | 4 | [
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-... | 3,652 | 3652 | |
Multigrade Equations
November 7th 2009, 02:23 PM #1
Senior Member
Joined
Apr 2009
From
Atlanta, GA
Posts
408
Multigrade Equations
A (k,d)-multigrade is a diophantine equation of the form $\sum_1^d m_i^j=\sum_1^d n_i^j$, that is valid for all powers $j=1,2,...k$. We can call k, the highest valid expon... | 4 | [
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-0.0205078125,
0.091796875,
-0.0120849609375,
0.0800... | 3,653 | 3653 | |
dy
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Musiclove13 Group Title
what is -x+y=5 in ... | 4 | [
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-0.0255126953125... | 3,654 | 3654 | |
variation of parameters
May 25th 2008, 07:28 PM #1
Member
Joined
Sep 2007
Posts
222
I am a bit confused on variation of parameters for solving differential equations. I understand the methods of coefficients but variation of parameters is a bit confusing. I would i use it to
solve this:
y'' - 5y'... | 5 | [
-0.01953125,
-0.035888671875,
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-0.00848388671875,
0.1064453125,
0.0216064453125,
0.0035552978515625,
-0.047119140625,
-0.0400390625,
-0.0361328125,
0.050537109375,
-0.0458984375,
-0.0184326171875,
-0.01953125,
0.03173828125,
0.0076904296875,
-0.04248046875,
-0.046142578... | 3,655 | 3655 | |
ALBHABETS SERIES IN REASONING ABILITY
1 11 21
A K U OPPOSITE LETTERS
B L V ( SUM IS 27 )
C M W UF BY LOVE
D N X SHIRT GAZ
E O Y PK MN JQ
F P Z CX DW
G Q
H R
I S
J T
Although such question are very simple, yet by doing them in a systematic manner you can save some extra seconds. We suggest that you perform r... | 4 | [
-0.1181640625,
0.08056640625,
0.0185546875,
0.003509521484375,
-0.08984375,
0.0732421875,
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-0.07080078125,
0.01300048828125,
0.00714111328125,
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-0.0035552978515625,
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-0.017822265625,
0.03564... | 3,656 | 3656 | |
tion
"""
This script tests fmin_slsqp using Example 14.4 from Numerical Methods for
Engineers by Steven Chapra and Raymond Canale. This example maximizes the
function f(x) = 2*x0*x1 + 2*x0 - x0**2 - 2*x1**2, which has a maximum
at x0=2, x1=1.
"""
from scipy.optimize import fmin_slsqp
from numpy import array
def tes... | 5 | [
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-0.05322265625,
-0.060791015625,
-0.057373046875,
0.00103759765625,
-0.123046875,
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0.038330078125,
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0.0390625,
-0.029541015625,
0.04296875,
-0.027587890625,
-0.041015625... | 3,657 | 3657 | |
double integrals
Well $\int\frac{x}{e^{x}}$ Let $u=ln(x)\Rightarrow{e^u=x}$ So $dx=e^{u}$ So we would have $\int\frac{e^{2u}}{u}du$ Which has no general solution but $e^{2u}=\sum_{n=0}^{\infty}\frac{2^nu^n}{n!}\
Righta rrow{\frac{e^{2u}}{u}=\sum_{n=1}^{\infty}\frac{2^n u^{n-1}}{n!}}$ so $\int\frac{e^{2u}}{u}du=\sum_{n=... | 5 | [
-0.015625,
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0.0057373046875,
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-0.0625,
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-0.033935546875,
0... | 3,658 | 3658 | |
Maximum Flow
From Progteam
Maximum Flow:
**images coming soon**
Consider a directed graph G (V, E) in which V represents the collection of vertices and E the collection of edges. The edges have a capacity Cv,w . We name two of the vertices S and T, the source and
the sink, such that all flow through the graph origi... | 4 | [
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-0.01031494140625,
0.... | 3,659 | 3659 | |
Two Phase Non-Rigid Multi-Modal Image Registration Using Weber Local Descriptor-Based Similarity Metrics and Normalized Mutual Information
Open Access This article is
• freely available
• re-usable
Article
Two Phase Non-Rigid Multi-Modal Image Registration Using Weber Local Descriptor-Based Similarity Metrics ... | 4 | [
-0.007720947265625,
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... | 3,660 | 3660 | |
IntroductionUnderwater Acoustic Propagation ModelRay TracingSound SpeedTransmission LossThe Dynamic Effect of SwellRelative Positioning SystemCoding SchemeMDS Positioning AlgorithmResults Using the Relative Positioning SystemStatistical Study of the System BehaviorTracking of the Movement Due to a Surface CurrentSummar... | 4 | [
0.0074462890625,
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0.0... | 3,661 | 3661 | |
help: Binomial Theorem - Expanding Terms
February 7th 2010, 12:40 PM
ilc
help: Binomial Theorem - Expanding Terms
The first three terms in the expansion of (1 + ay)^n are 1, 12y and 68y^2.
Evaluate a and n. Use the fact that:
(1+ay)^n = 1 + nay + {[n(n-1)]/2}(ay)^2 +....
----------------------
... | 4 | [
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Haskell for Maths
I've just uploaded a new version v0.4.1 of
HaskellForMaths
, containing three new modules and a couple of other improvements. The additions are as follows:
Math.Algebras.Quaternions
This module was already present: it defines the quaternion algebra on the basis {1,i,j,k}, where multiplication is d... | 5 | [
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... | 3,663 | 3663 | |
integrating with FFT
On Dec 27 2007, 3:49=A0am, Greg Heath <he...@alumni.brown.edu> wrote:
> On Dec 26, 8:56 pm, "Paul " <p...@ceri.memphis.edu> wrote:
>
> > You can integrate in the frequency domain by dividing the
> > complex FFT by iw.
>
> With caveats.
>
> To be consistent with the periodic DFT, make the following
... | 4 | [
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... | 3,664 | 3664 | |
Project Euler 122: Most efficient exponentiation method. | MathBlog
Project Euler 122: Finding the most efficient exponentiation method.
Written by Kristian on 10 November 2012
Topics: Project Euler
Problem 122 of Project Euler has really proved troublesome for me, partly because I couldn’t read the material I go... | 5 | [
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-0.0... | 3,665 | 3665 | |
1.6 Encryption
Video
Textbook
Interactive
Download PDFs
Additional Resources
1.6 Encryption
HISTORY
• The need to send private messages has ancient roots.
• Most historical encryption schemes used private keys.
When sending sensitive information, such as logging onto a bank account via the World Wide Web, we want t... | 4 | [
-0.038330078125,
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0.0... | 3,666 | 3666 | |
range of values and conditions
March 28th 2013, 10:57 PM
Renrie
range of values and conditions
here the answer would be basically:
i) AB: 2<x<1
ii) C: 6
iii) D: 8
could you please explain to me how to solve it and understand it properly? Thanks!
Attachment 27729
March 29th 2013, 04:54 AM
... | 4 | [
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-0.035888671875,
-0... | 3,667 | 3667 | |
Solve using Gauss–Jordan method...?
July 14th 2008, 01:42 PM #1
Newbie
Joined
May 2008
Posts
12
Solve using Gauss–Jordan method...?
Use the Gauss–Jordan method to solve the following system of linear equations:
(A system with more variable than equations is called
underdetermined.)
... | 5 | [
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-0.0673828125,
-0.018... | 3,668 | 3668 | |
GCD Proof With Squares
October 25th 2009, 02:43 PM
Reindeer Floatilla
GCD Proof With Squares
Prove:
If $gcd(a,b)=gcd(a,c)$, then $gcd(a^2,b^2)=gcd(a^2,c^2)$.
My knowledge of the greatest common factor (GCD) is rather limited, but I'm thinking this will involve representing GCD expressions with linear... | 4 | [
-0.00154876708984375,
0.04345703125,
-0.026123046875,
-0.048828125,
-0.00823974609375,
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0.032958984375,
-0.001144409179... | 3,669 | 3669 | |
How to factor x^5-5x^3+4x ?
x^5-5x^3+4x ...I don't know exactly how to do that :-|
Or. Take the possible zero's using the rational rooth theorem. $\pm1,\pm2,\pm3,\pm4<br />$ 1.Then used synthetic division a few times. 2.Once done, you will have found all the zero's (where r=0).
3.Then just put it in factored form. 1. ... | 4 | [
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-0.0111... | 3,670 | 3670 | |
Math Help
August 29th 2011, 05:01 AM #1
Newbie
Joined
Aug 2011
Posts
1
Subspaces
Hi there. I started learning about subspaces in linear algebra and I came across a question which i'm unsure how to solve. I understand that there are 'rules' which need to be passed in order for
something to be a subsp... | 5 | [
-0.01373291015625,
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-0.021728515625,
0.00445556640625,
-0.0147705078125,
-0.0038299560546875... | 3,671 | 3671 | |
Research
October 2006
<<September October November>>
Answer:
We give the answers to each part with a sketch of the proofs.
1. 5/14. It is easy to see that T is formed by removing a strip along each side of S and that each strip has expected area 1/4 of the area of S. However we have to add back the area near the c... | 5 | [
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0.0234375,
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-0.037353515625,
-0.1386... | 3,672 | 3672 | |
Even vs. Odd in a combinatoric proof
January 1st 2011, 11:36 PM
RespeckKnuckles
Even vs. Odd in a combinatoric proof
I was given a problem to simplify the following:
$\sum_{k \geq 0} \binom{n}{2k}$
where:
$\binom{n}{j} = 0$ whenever j > n.
It's easy to see that the problem is equivalent to:
$... | 5 | [
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0.033935546875,
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0.02099609375,
-0.015... | 3,673 | 3673 | |
Jonah B. Gelbach's Blog
[Updated to correct mis-spellings of Bill Belichick's name.]
I think Levitt is off base. There are two issues.
First, Romer's article (self-consciously) says nothing about late-game situations: it deliberately focuses on first-quarter situations precisely to avoid issues related to the end... | 4 | [
-0.0732421875,
-0.005401611328125,
0.01336669921875,
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-0.0172119140625,
0.034912109375,
0.0189208984375,
0.0035858154296875,
0.053466796875... | 3,674 | 3674 | |
Math Induction
March 24th 2010, 06:01 PM #1
Junior Member
Joined
Feb 2010
Posts
37
Math Induction
Let a be a non zero number and m and n be integers. Prove by induction that:
(1) $a^{m+n} = a^{m} a^{n}$
(2). ${(ab)}^{n} = {a^n}{b^n}$
can anyone explain me the basis and inductive steps here... | 4 | [
-0.021728515625,
0.046142578125,
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0.0986328125,
-0.035400390625,
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0.039306640625,
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0.03955078125,
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0.1201171875,
-0.07421875,
0.0732421875,
-0.07... | 3,675 | 3675 | |
st: AW: marginal effects and standard errors in count regressions
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
st: AW: marginal effects and standard errors in count regressions
From "Martin Weiss" <martin.weiss1@gmx.de>
To <statalist@hsphsun2.harvard.edu>
Subject st: AW: marginal... | 5 | [
-0.022705078125,
-0.00153350830078125,
0.030517578125,
0.115234375,
0.07666015625,
0.12890625,
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0.048095703125,
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-0.056396484375,
-0.0205078125,
-0.016845703125,
... | 3,676 | 3676 | |
Cybermetrics
Part 1 was
Explaining The 1959 White Sox
. There I showed that the White Sox had a much higher winning percentage than their underlying stats would indicate. Here I try to quantify how much their clutch performance helped. They had an
actual winning percentage of .610.
But according to my study from a f... | 4 | [
-0.0625,
0.0322265625,
0.004302978515625,
0.0150146484375,
0.006378173828125,
-0.045654296875,
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0.03076171875,
-0.0556640625,
-0.010009765625,
0.033935546875,
0.003... | 3,677 | 3677 | |
ar
As an example, consider the development of molecular mechanics parameters for the nitrile group. A natural choice of appropriate fluid is acetonitrile. First of all we repeat what has been done in
article^1).
First of all, we try to reproduce the ΔH[vap] = 8.009 kcal/mol and d = 0.773 g/cm^3. In the paper calculati... | 4 | [
-0.12451171875,
0.03271484375,
0.01422119140625,
0.0283203125,
-0.004058837890625,
-0.040283203125,
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-0.042236328125,
... | 3,678 | 3678 | |
A cylindrical frame volume max
December 14th 2006, 08:51 PM #1
Newbie
Joined
Dec 2006
Posts
10
A cylindrical frame volume max
A cylindrical kite frame is to be constructed from a 4-m length of light bendable rod.
The frame will be made up of 2 circles joined by four straight rods of equal length. In... | 5 | [
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0.057861328125,
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0.02... | 3,679 | 3679 | |
When the size of two finite sets is equal
December 21st 2011, 05:53 PM #1
Member
Joined
Oct 2010
From
Mumbai, India
Posts
203
When the size of two finite sets is equal
Hi
I am trying to prove the following. Suppose A and B are finite sets
and $f:A\to B$
Prove that if $|A|=|B|$ then $f$ ... | 4 | [
0.01141357421875,
0.01226806640625,
0.004669189453125,
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0.0654296875,
-0.03051... | 3,680 | 3680 | |
Solution for equations in the form 0 = ax + byz - cz
October 19th 2010, 04:24 PM #1
Newbie
Joined
Oct 2010
Posts
4
Solution for equations in the form 0 = ax + byz - cz
I am new to this forum and my math is a little rusty at this point, any help you guys could offer will be very much appriciated.
I h... | 5 | [
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-0.10009765625,
-0.00... | 3,681 | 3681 | |
or
Total cost of owning and driving a 60 kWh Tesla Model S (no options) in California, for 36 months, and 45,000 miles in total.
I would like to make a calculation to determine this total amount (as accurate as possible), for which I would like your assistance as well.
A citizen of California wants to own and drive a... | 5 | [
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0.08251953125,
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-0.0063... | 3,682 | 3682 | |
vector calc...point of intersection
September 17th 2009, 12:52 PM
holly123
vector calc...point of intersection
show that the two lines x=(-1/2 t, 2/3 t +1, t- 3/2) and x= (t- 3/2, 2t+3, 3t+ 9/2) intersect. find an equation for the plane that they determine.
i have no clue how to do this i keep getting stuck... | 5 | [
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Brouwer: A Proof Finding Program
The Brouwer theorem-prover for Intuitionistic, BCI, BCK, and Classical logic (© Anthony Dekker 1992-1995) operates by enumerating lambda-calculus terms of a given type. The initial Brouwer 0.5.0
release [Macintosh SEA/HQX file: 283K] is available for download and testing on request.
Us... | 4 | [
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MathGroup Archive: October 2002 [00095]
[Date Index] [Thread Index] [Author Index]
RE: Inequality solving
• To: mathgroup at smc.vnet.net
• Subject: [mg36977] RE: [mg36966] Inequality solving
• From: "DrBob" <drbob at bigfoot.com>
•... | 5 | [
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equivalence relation and equivalence classes
January 7th 2010, 02:09 PM #1
Member
Joined
Sep 2005
Posts
84
Hi i need help with this following question. I am not sure on how to approach it.
Define the relation R on $\mathbb{N}$ by $xRy\Leftarrow \Rightarrow x^{2}-y^{2}$ is divisible by 7 $(x,y\in \mat... | 4 | [
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Tool Building: Web-based Linear Algebra Modules - Transformer2D Tool and Sample Activity
Using Transformer2D is considerably different from using GridMaster, in which all actions took place on a single graphical interface. In Transformer2D, the interface has been partitioned into
different regions, each having its own ... | 4 | [
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The Parabola
December 15th 2007, 01:19 PM #1
Member
Joined
Mar 2007
From
England
Posts
104
The Parabola
Currently stuck on my hw, to be handed in on Monday, wondering if anyone can help?
The normal to the parabola with the equation y^2=4ax at the point P(at^2, 2at) meets the curve again at the p... | 4 | [
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About some module over a DVR
April 11th 2011, 10:15 AM #1
Junior Member
Joined
Jan 2009
Posts
29
About some module over a DVR
Let $R$ be a DVR and $M$ be a free $R$-module of rank $1$.
If $f:M\to M$ is a surjective $R$-linear map then $f$ is an isomorphism.
the problem is a very special case of ... | 5 | [
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Prove by Mathematical Induction
June 1st 2007, 09:23 AM #1
Newbie
Joined
Jun 2007
Posts
3
Prove by Mathematical Induction
Hi everyone I need a little help, Im stuck.
I have to prove by induction that:
$<br /> 2^{n+2} + 3^{2n+1}<br />$
is exactly divisible by 7 for all positive integers of ... | 4 | [
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Matching Arrow Weights
If one is shooting at a distance L (say 70m, the Olympic distance), roughly how closely must the arrows be matched in weight to guarantee that a perfect shooter can make a group of them land within a
vertical distance H (perhaps half an inch)?
As we will see, matching to one grain (around 65mg)... | 5 | [
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Urgent and important??! integral inequality
December 17th 2006, 10:33 AM
miss_lolitta
Urgent and important??! integral inequality
Hi guys,
please can someone here help me to prove that:
Assume that:
$\int_1^{\infty}c(x)^{1/2}<\infty$
this implies that:
$\lim_{x \to\infty}{x c(x)^{1/2}}=0$... | 5 | [
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Second degree differential equation
October 20th 2011, 05:04 PM #1
Member
Joined
Nov 2010
Posts
164
Second degree differential equation
Hello again. How do I solve the diff. equation (dy/dx)^2 + x* (dy/dx) - y = 0?
It's the first time that I face a second degree diff. equation and don't know how to ... | 5 | [
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Convergence of series
March 20th 2011, 05:28 PM #1
Member
Joined
Nov 2010
Posts
164
Convergence of series
I have to find if the following series converge:
a) Sum from k=1 to k=inf of k^k*e^(-k^2)
b) Sum from k=1 to k=inf of (1/sqrt(k))*e^(-2*sqrt(k))
For a I told that since k^k*e^(-k^2) is... | 5 | [
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Representing a product of matrix exponentials as the exponential of a sum
up vote 14 down vote favorite
5
In Proof of a conjectured exponential formula, R. C. Thompson (1986) [edit: apparently, assuming Horn's conjecture] proved that if $A$ and $B$ are Hermitian matrices, then there exist unitary
matrices $U$ and $V$,... | 5 | [
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Finding Values of A and B
November 17th 2009, 10:31 AM
KingV15
Finding Values of A and B
Determine a and b so that (x-1)^2 divides evenly into the polynomial
f(x)=ax^4+bx^3+1.
First you must divide x-1 into f(x), the divide x-1 again into quotient.
November 17th 2009, 08:40 PM
I4talent
Quote:
... | 4 | [
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Homework Help
Posted by Kelcie on Thursday, October 15, 2009 at 1:18am.
A projectile is fired with an initial speed of 31.0 at an angle of 10.0 above the horizontal. The object hits the ground 7.50 later.
a. How much higher or lower is the launch point relative to the point where the projectile hits the ground?
b. T... | 4 | [
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Math Help
February 15th 2011, 05:25 PM #1
Member
Joined
Nov 2009
Posts
78
If $a^1^/^x = b^1^/^y = c^1^/^z$ & $b^2 = ac$, how do I find the value of $(x + z)/2y$?
Thanks,
Ron
Last edited by BAdhi; February 15th 2011 at 06:23 PM. Reason: added latex tags
I don't have any idea about logs... | 4 | [
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Revised: A sequence of non-empty, compact, nested sets converges to its intersection
September 13th 2012, 10:08 AM
goedelite
Revised: A sequence of non-empty, compact, nested sets converges to its intersection
Proposition 2.4.7 * $S$ is a metric space with metric $\rho$. ${A_n}$ is a sequence of descending, non... | 4 | [
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