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Math Forum » Discussions » Policy and News » geometry.ann... | 4 | [
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coexponential map
nLab
coexponential map
The coexponential or symmetrization map is the unique linear map from the symmetric Hopf algebra $S(L)$ on the (underlying vector space of a) Lie algebra $L$ to the enveloping Hopf algebra $U(L)$ of
$L$
$e : S(L)\to U(L)$
such that $e(y)^n = e(y^n)$ for every “linear” elemen... | 4 | [
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... | 10,601 | 10601 | |
History Of The Theory Of Numbers - I
368 HISTORY OF THE THEORY OF NUMBERS. [CHAP, xiv
solutions if a is not a square) and testing x2 — 1 for a factor in common with a. Further, if ay+l=x2 does not hold for Ka?<a— 1, then a is a power of a prime and conversely [false if a= 10].
Marcker101 no... | 4 | [
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-0.05419921875... | 10,602 | 10602 | |
Eliminating theta
September 10th 2012, 03:53 PM #1
Junior Member
Joined
Sep 2011
From
San Antonio, TX
Posts
45
Eliminating theta
I have the two equations:
1) x + y = qsin(theta)
2) z = rcos(theta)
The question is eliminate theta and solve for q in terms of x, y, z, and r.
I'm not ... | 4 | [
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0.018188476... | 10,603 | 10603 | |
Math Help
April 22nd 2007, 12:52 AM #1
Newbie
Joined
Apr 2007
Posts
6
Parabola
Hello, could someone show me how I would answer these problems.
Sketch the graph of the parabola
y
= 3x^2 −12x
Circle the vertex, and state both the domain and the range (using
int... | 4 | [
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Standard Error
Explanations > Social Research > Statistical principles > Standard Error
Description | Example | Discussion | See also
Description
If you measure a sample from a... | 4 | [
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Joint clustering of protein interaction networks through Markov random walk
Abstract
Biological networks obtained by high-throughput profiling or human curation are typically noisy. For functional module identification, single network clustering algorithms may not yield accurate and
robust results. In order to borrow ... | 4 | [
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fast and simple constraint programming involving vectors (arrays)
up vote 0 down vote favorite
I have many,many, many vectors that I need to check for duplicates of numbers with some very basic first order logic.
I can use intersections, but that is proving to be too slow. I thought I could turn this into a bitwise p... | 5 | [
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Mathematics of the Environment (Part 9)
I didn’t manage to cover everything I intended last time, so I’m moving the stuff about the eccentricity of the Earth’s orbit to this week, and expanding it.
Sunshine and the Earth’s orbit
I bet some of you are hungry for some math. As I mentioned, it takes some work to see ho... | 4 | [
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... | 10,608 | 10608 | |
Homework Help
Posted by Korie on Thursday, June 6, 2013 at 2:59pm.
Identify the solution of the system of equations
3x-2y=6
5x=5-25y
• Algebra - Kuai, Thursday, June 6, 2013 at 3:53pm
3x -2y = 6
5x = 5 - 25y
x = 1-5y
Substituting
3(1-5y) -2 y = 6
3-15y -2y = 6
3- 17y = 6
3-3... | 4 | [
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Too many equations (collinear?)
March 1st 2011, 03:17 PM #1
Junior Member
Joined
Apr 2010
Posts
40
Too many equations (collinear?)
Hello all,
I just need to clarify this. If I have too many equations (lets say 5 equations and 4 unknowns), when we say there is collinearity that means that 2 of the eq... | 4 | [
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Homework Help
Posted by babygirl on Wednesday, August 31, 2011 at 10:16pm.
solve and check.label ant contradictions or identities.
5(t+1)+8=3(t-2)+6
5t+5+8=3t-6+6
5t+13=3t
2t=-13
t=-13/2
check59t+1)+8=3(t-2)+6
5(-13/2)+1+8=3(-13/2)-2)+6
-65/2+13=-39/2
13=-39/2+65/2
13=26/2
13=13
want to know if this right
... | 4 | [
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Activit
Activity #6
This is a series of activities which illustrate the principles behind hidden mass, rotation curves and the evidence for hidden mass.
Activity #6a: Modeling Mass in the Solar System and a Galaxy
In this activity, students will discover how mass is distributed in the solar system and a galaxy.
Mat... | 4 | [
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Algebraic Structures
Date: 02/22/99 at 01:24:35
From: Mari
Subject: Algebraic Structures
A friend and I are stuck on two homework problems. Please help us.
1) Suppose that N and M are two normal subgroups of G and that
(N intersect M) = (e). Show that for any n element of N,
m element of M,
nm = mn.
W... | 5 | [
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... | 10,613 | 10613 | |
Parameterizing a curve in R^2
December 14th 2013, 01:26 PM #1
Junior Member
Joined
Apr 2013
From
Canada
Posts
42
Thanks
2
Parameterizing a curve in R^2
A circle with radius a centered at the origin O. T is a point on the circle such that OT makes angle t with the positive x-axis. The tangent... | 4 | [
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Java implementation of the Kalman Filter using JAMA
This is a very clear and straight forward implementation of the Discrete Kalman Filter Algorithm in the Java language using the JAMA package. I wrote this code for testing and simulation purposes.
import Jama.Matrix;
/**
* This work is licensed under a Creative Com... | 4 | [
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0.026... | 10,615 | 10615 | |
Task 5b
Task 5b: How to Perform Linear Regression Using SAS Survey Procedures
This example uses the demoadv dataset (download at Sample Code and Datasets). In this example, you will assess the association between systolic blood pressure (mean_spb) — the outcome variable — and
calcium supplement use (anycalsup) — the e... | 4 | [
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MATH 1010 Group Projects
#1: Maximizing the Profit of a Business
Background Information:
Linear Programming is a technique used for optimization of a real-world situation. Examples of optimization include maximizing the number of items that can be manufactured or minimizing the cost of
production. The equation that r... | 4 | [
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0.043212890625,
... | 10,617 | 10617 | |
Homework Help
Posted by CHRIS on Saturday, November 9, 2013 at 1:53pm.
An operation produces (A-1)/A from a fraction A=m/n, where m is not equal with n and m is not zero. If the initial value of A is 22/47 and the operation is repeated 2012 times, the final output is a/
b. What is a and b?
• Maths - Reiny, Saturday... | 4 | [
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What about these types of radicals?
June 5th 2006, 03:09 PM #1
Junior Member
Joined
May 2006
Posts
38
What about these types of radicals?
I have only about fifty more to do at the moment and am struggling on a few more.
First problem not sure I really get this type of one
Use rational exponents t... | 4 | [
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... | 10,619 | 10619 | |
A golf ball traveling 3 m/s
August 16th 2006, 10:49 AM
LLELLA
A golf ball traveling 3 m/s
A golf ball traveling 3 m/s to the right has a head-on collision with a stationary bowling ball in a friction-free environment. If the collision is almost perfectly elastic the speed of the golf
ball immediately after t... | 5 | [
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0.0216064453125,
-0... | 10,620 | 10620 | |
Cylinder Question-Complicated
May 28th 2009, 06:01 AM #1
Newbie
Joined
May 2009
Posts
1
A Cylinder has base of radius 7cm ...height 15cm.....it is a regular cylinder....
1.water is filled upto height of 10cm of this cylinder , find the volume of water...
Answer : v= 22/7 x 7 x 7 x 10
: volum... | 4 | [
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0.09033203... | 10,621 | 10621 | |
Prove Convergence
September 27th 2007, 06:30 PM #1
Junior Member
Joined
Sep 2007
Posts
46
Prove Convergence
1a.) Prove the sequence converges which is defined by x_1 = 3 and x_(n + 1) = 1/(4 - x_n)
b.) Now we know lim x_n exists... explain why lim x_(n + 1) must also exist, and further, explain why ... | 5 | [
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-0.0090332031... | 10,622 | 10622 | |
Low-discrepancy sampling methods
Due to the fundamental importance of numerical integration and the intricate link between discrepancy and integration error, most sampling literature has led to low-discrepancy sequences and point
sets [738,893,937]. Although motion planning is quite different from integration, it is wo... | 4 | [
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0.01409912109375,
0.056884765625,... | 10,623 | 10623 | |
continuity / differentiability problem
May 25th 2009, 04:56 PM #1
Member
Joined
Aug 2008
Posts
249
continuity / differentiability problem
this problem i know how to do ("</=" means less than or equal to)
f(x) = x^2 , x </= 1
x^(1/2) , x > 1
f(1) = 1^2 = 1
lim f(x) = 1
x~> 1+
lim... | 5 | [
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-0.0771484... | 10,624 | 10624 | |
Math Forum Discussions - Re: The 11 Most Beautiful Mathematical Equations
Date: Jan 31, 2013 3:05 AM
Author: Tom Potter
Subject: Re: The 11 Most Beautiful Mathematical Equations
"1treePetrifiedForestLane" <Space998@hotmail.com> wrote in message
news:8be240f8-71b6-4b00-9911-790f5fd85137@rm7g2000pbc.googlegroups.com...... | 4 | [
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0.00... | 10,625 | 10625 | |
Posts about matrix on Lucky's Notes
Project Euler 280
March 6, 2010
Project Euler 280 is an interesting problem involving probability and combinatorics:
There is a 5×5 grid. An ant starts in the center square of the grid and walks randomly. Each step, the ant moves to an adjacent square (but not off the grid).
... | 5 | [
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... | 10,626 | 10626 | |
Number theory problem
September 15th 2009, 01:41 AM
offahengaway and chips
Number theory problem
n^4-n^2=n x (n-1)n(n+1)
deduce that n^4-n^2 is always divisible by 3 , for any positive integer n.
Any help starting off this question would be appreciated,
thanks
September 15th 2009, 01:49 AM
coqui... | 4 | [
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-0.052001953125,
-0.0380859375,
0.021240234... | 10,627 | 10627 | |
a question of Galois cohomology
up vote 0 down vote favorite
Let $R$ be a complete DVR with algebraically closed residue field $k$ and fractional field $K$ , $PGL(2)$ the automorphic group of projective line over $\overline K$.
My question is:
When $H^{1}(Gal(\overline K/K), PGL(2))=0$ ? Is this group trivial if $Ch... | 5 | [
-0.041015625,
-0.0294189453125,
0.01092529296875,
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0.025390625,
-0.0235595703125,
0.0201416015625,
-0.08154296875,
0.078125,
-0.00970458984375,
-0.0771484375,
-0.053955078125,
-0.01348876953125,
0.00677490234375,
-0.058837890625,... | 10,628 | 10628 | |
Non coherent demodulation of pi/8 D8PSK (TETRA)
In TETRA specifications, one of the modulation technique used is $\frac{\pi}{8}$ Differential 8 Phase Shift Keying (D8PSK). We will discuss the bit error rate with non-coherent demodulation of $\frac
{\pi}{8}$D8PSK in Additive White Gaussian Noise (AWGN) channel.
pi/8 D... | 4 | [
-0.11181640625,
0.0308837890625,
-0.0654296875,
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-0.025146484375,
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0.01397705078125,
0.037841796875,
-0.0128173828125,
0.0252685546875,
-0.07763671875,
0.04052734375,
-0.0947265625,
-0.0002536773681640625,
-0.0361328125,
0.02392578125... | 10,629 | 10629 | |
Relationship between free probability and deterministic graphs?
up vote 7 down vote favorite
Consider the $N\times N$ matrix $$ M = \left(\begin{array} \\ 0 & 1 & & 0 \\ 1 & \ddots & \ddots & \\ & \ddots & \ddots & 1 \\ 0 & & 1 & 0 \\ \end{array}\right) $$
which comes from the adjacency matrix of a graph correspondin... | 4 | [
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-0.1083984375,
-0.046630859375,
0.0098876953125,
0.0172119140625,
-0.06396484375,
-0.0279541015625,
0.01031494140625,
0.0390625,
0.029296875,
0.06494140625,
-0.020751953125,
0.091796875,
-0.0322265625,
0.01348876953125,
-0.001983642578125,
0.0771484375,
-0.0869140625,... | 10,630 | 10630 | |
REGSTATTOOLS: freeware statistical tools for the analysis of disease population databases used in health and social studies
Abstract
Background
The repertoire of statistical methods dealing with the descriptive analysis of the burden of a disease has been expanded and implemented in statistical software packages duri... | 4 | [
-0.0004100799560546875,
-0.0025177001953125,
-0.08642578125,
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0.1279296875,
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0.039306640625,
0.0125732421875,
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0.006378173828125,
-0.1337... | 10,631 | 10631 | |
Some basic questions about Chern-Simons theory
up vote 5 down vote favorite
13
Let the Chern-Simons lagrangian for a group $G$ be, $$L= k \epsilon^{\mu \nu \rho} Tr[A_\mu \partial _ \nu A_\rho + \frac{2}{3} A_\mu A_\nu A_\rho]$$
Then it is claimed that on "infinitesimal" variation of the gauge field ("connection") th... | 4 | [
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-0.0869140625,
0.0284423828125,
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-0.03076171875,
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-0.0888671875,
0.01953125,
-0.0289306640625,
0.08740234375,
-0.03076171875,
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-0.0169677734375,
-0.00054168701171875,
0.006011962890625,
-0.08447265625,
0.05346679... | 10,632 | 10632 | |
Momentum vs. Energy
Difference Between Momentum and Energy
Momentum and energy the laws of motion invented by Newton. These are the properties of an object in a movement. Momentum is explained as the product of velocity and mass of the moving object. Kinetic
energy is the half of product of the square of velocity and... | 4 | [
0.0595703125,
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0.037353515625,
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0.0179443359375,
0.0556640625,
0.07080078125,
0.059326171875,
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0.0225830078125,
0.09033203125,
0.01092529296875,
0.072265625,
0.1337890625,... | 10,633 | 10633 | |
TAYLOR-function null
July 24th 2009, 03:50 AM #1
Newbie
Joined
Jul 2009
Posts
12
TAYLOR-function null
hello,
f is a function $C^{\infty}$ from [a,b] to $\mathbb{R}$.
We suppose :
$\exists x_0 \in ]a,b[ \ and \ k \ real \ >0 | \forall n\in \mathbb{N},f^{(n)}(x_0)=0 \ \ and \ \ sup_{[a,b]}\{... | 5 | [
-0.01177978515625,
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0.0033111572265625,
-0.10009765625,
-0.09423828125,
0.0272216796875,
0.012... | 10,634 | 10634 | |
Real Numbers
The Set of Real Numbers
First, a few terms:
Terminating Decimal: A decimal that ends, having a finite number of digits after the decimal point. Sample: 3/4 = 0.75
Repeating Decimal: A decimal that doesn't end; it shows a repeating pattern of digits after the decimal point. Sample: 1/3 = 0.3333...
For qu... | 4 | [
-0.06787109375,
-0.001220703125,
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-0.07861328125,
-0.0908203125,
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0.027587890625,
0.01434326171875,
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-0.119140625,
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0.02978515625,
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-0.0595703125,
-0.0306396484375,
0.01... | 10,635 | 10635 | |
eek
April 23, 1995
This Week's Finds in Mathematical Physics (Week 51)
John Baez
For people in theoretical physics, Trieste is a kind of mecca. It's an Italian town on the Adriatic quite near the border with Slovenia, and it's quite charming, especially the castle of Maximilian
near the coast, built when parts of no... | 4 | [
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-0.05810546875,
-0.01177978515625,
0.00... | 10,636 | 10636 | |
Integral proofs
September 29th 2008, 10:28 AM #1
Junior Member
Joined
Sep 2008
Posts
73
Integral proofs
Actually I have 2 questions?
1) Prove that the integral of (df/dx) from a to be is equal to f(b) - f(a) using the definition of Riemann Integration and the definition of derivative.
I tried u... | 5 | [
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-0.00823974609375,
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0.0283203125,
-0.00982666015625,
-0.006072998046875,
-0.0257568359375,
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0.039306640625,
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-0.0086669921875,
-0.057861328125,
0.08447... | 10,637 | 10637 | |
Number of integer combinations x_1 < ... < x_n ?
up vote 4 down vote favorite
1
I asked this question earlier on math.stackexchange.com but didn't get an answer:
Let $0 < a_1 < ... < a_n$ be integers. Is there a closed formula (or some other result) for the number $N(a_1,...,a_n)$ of integer combinations $0 < x_... | 5 | [
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Graphing Quadratic Functions
By T. Barron & S. Kastberg
Lesson 6
... | 4 | [
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-0.015869140625,
-0.00233459472656... | 10,639 | 10639 | |
integrals
March 20th 2007, 05:56 AM #1
Newbie
Joined
Mar 2007
Posts
4
integrals
Hello!
I've got some really tough question and I could use some help with it.
calculate the result and choose the closest answer to these given answers
The answers are:
A -450.3091514312
B 450.3091514312... | 5 | [
-0.07763671875,
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-... | 10,640 | 10640 | |
solved algebracially
arcsinx-arccosx = 0 i know x is 45 but how to do algebraccly
Check the problem. If sinx - cosx = 0 then x = 45 degrees. Now arcsinx+arccosx = π/2 arcsinx-arccosx = arcsinx+arccosx - 2arcosx = 0 π/2 -2arccosx = 0 Solve for x.
Hello, aeroflix! Solve: . $\arcsin x-\arccos x \:=\: 0$ i know x is 45 .... | 4 | [
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-0.01... | 10,641 | 10641 | |
Difference Between Variance and Covariance
Variance vs Covariance
Variance and covariance are two measures used in statistics. Variance is a measure of the scatter of the data, and covariance indicates the degree of change of two random variables together. Variance
is rather an intuitive concept, but covariance is def... | 4 | [
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0.055908203125,
-0.03... | 10,642 | 10642 | |
expfit
PURPOSE
% USAGE [alpha,c,rms] = expfit( deg, x1, h, y )
SYNOPSIS
function [a,c,rms] = expfit(deg,x1,h,y)
DESCRIPTION
% USAGE [alpha,c,rms] = expfit( deg, x1, h, y )
%
% Prony's method for non-linear exponential fitting
%
% Fit function: \sum_1^{deg} c(i)*exp(alpha(i)*x)
%
% Elements of data vector... | 5 | [
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-0.052734375,
0.0244140625,
0... | 10,643 | 10643 | |
Vectors and planes
May 26th 2008, 08:57 AM #1
Junior Member
Joined
May 2008
Posts
27
Vectors and planes
Please help. A ray of light coming from the point (-1, 3, 2) is travelling in the directionof the vector 4i + j -2k and meets the plane x + 3y + 2z - 24= 0. Find the angle that the ray of light
mak... | 5 | [
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-0.0927734375,
-0.0... | 10,644 | 10644 | |
The Period of 61/97
Date: 01/12/2001 at 08:46:22
From: Celia
Subject: period of 61/97
I need to know the period of 61/97 (if there is one). I've calculated
it to the 31st decimal place, but can't tell if it is a finite or
infinite and periodic... Is there any way I can figure it out?
Thank you!
Celia
Date: 01/12/... | 5 | [
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-0.006... | 10,645 | 10645 | |
Volume of intersection of a convex polytope with an affine space.
up vote 1 down vote favorite
Given an $n$-dimensional polytope $P\subset \mathbb{R}^n$.
For a subset of indices $i_1,\ldots,i_k$ of $\{1,\ldots,n\}$ and reals $a_1,\ldots,a_k$, we denote by $P(x_{i_1}=a_{1},\ldots,x_{i_k}=a_{k})$ the set of point of th... | 4 | [
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0.006... | 10,646 | 10646 | |
WebDiarios de Motocicleta
We all know the number guessing game. I think of an integer between 1 and n, and you try to guess it by comparison queries, "is it larger than x?". Binary search takes ceiling(log[2] n) queries,
which is of course optimal.
But what if I think of a rational number a/b , with 0<a<b<n? Can you s... | 5 | [
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0.07470703125,
... | 10,647 | 10647 | |
Co-ordinate Geometery urgent help needed
January 7th 2009, 03:44 PM #1
Member
Joined
Oct 2008
Posts
157
Co-ordinate Geometery urgent help needed
A, B, C and D are (-7,4), (3,-1), (6,1) and (k,-15) respectively.
1] Find the gradient of AB
2] Find the equation of AB and simplify the answer
3] ... | 4 | [
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... | 10,648 | 10648 | |
Homework Help
Posted by Anonymous on Sunday, December 30, 2012 at 8:38pm.
A car goes at 40 miles per hour and returns at the same route at 30 miles per hour. What is the total distance if the time is 1 hour?
My answer
17 and 3/7
• Math.. - Reiny, Sunday, December 30, 2012 at 10:53pm
let the time for first tr... | 4 | [
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help me with differential equation
October 24th 2008, 02:00 PM #1
help me with differential equation
hey all this is my first post and im sorry that i begin asking bt well ill try to help too whenever i can...
this is about second grade differential equations...
consider the equation
$xy''-(x+N)y'+... | 5 | [
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-0.01190185546875,
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-0.0201416015625,
-0.0183... | 10,650 | 10650 | |
comprehensive factorization
In Cat there is a factorization system $(E,M)$ where $E$ is the class of initial functors and $M$ is the class of discrete opfibrations; see
• Street, Walters, The comprehensive factorization of a functor. Bull. Amer. Math. Soc. 79, 1973.
We can construct an analogous factorization syste... | 4 | [
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-0.02465... | 10,651 | 10651 | |
ge
Linear algebra
Vector spaces
The VectorSpace command creates a vector space class, from which one can create a subspace. Note the basis computed by Sage is “row reduced”.
sage: V = VectorSpace(GF(2),8)
sage: S = V.subspace([V([1,1,0,0,0,0,0,0]),V([1,0,0,0,0,1,1,0])])
sage: S.basis()
[
(1, 0, 0, 0, 0, 1, 1, 0),
(0... | 5 | [
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-... | 10,652 | 10652 | |
The Transformation y = f(bx) - Concept
Brightstorm is like having a personal tutor for every subject
See what all the buzz is about
Check it out
The Transformation y = f(bx) - Concept 8,041 views
There are different types of math transformation, one of which is the type y = f(bx). This type of math transformation i... | 4 | [
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0.... | 10,653 | 10653 | |
Power evaluation of disease clustering tests
Abstract
Background
Many different test statistics have been proposed to test for spatial clustering. Some of these statistics have been widely used in various applications. In this paper, we use an existing collection
of 1,220,000 simulated benchmark data, generated under... | 4 | [
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Poincaré duality for smooth projective varieties over finite fields
up vote 0 down vote favorite
What is exacly the statement of Poincaré duality for smooth projective varieties over finite fields and twisted constant $\mathbf{Z}_\ell$ sheaves? Where can I find a proof?
By twisted constant $\mathbf{Z}_\ell$ sheaf, I ... | 4 | [
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0.09375,
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-0.06640625,
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0.0458984375,
-0.05517578125,
-0.0172119140625,
-0... | 10,655 | 10655 | |
Another word problem that's stumping me
May 29th 2010, 12:58 PM
cherryperry
Another word problem that's stumping me
This is yet another example of a problem on the sample NC EOG test (7th grade).
A rectangular piece of land will be divided diagonally into two congruent triangular sections. One section will ... | 4 | [
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0.0703125,
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Rearranging an algebraic equation
Having some difficulty making q the subject: ((a-c)/b(2+vj)-(q/2+vj) = ((a-c)/b)-q(2+vi) Any help would be appreciated.
Separate everything involving q from every thing NOT involving q: [(a-c)/(b(2+vj))]- q/2- [vj]= [(a- c)/b]- (2+vi)q Get everything involving q on the left side, ever... | 4 | [
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-0.043701171875,
0.0908203125... | 10,657 | 10657 | |
findings mean, SD and approximate distribution
June 30th 2009, 06:03 AM #1
Newbie
Joined
Jun 2009
Posts
18
findings mean, SD and approximate distribution
Let X1,X2,....,X81 be a random sample from a distribution (not necessarily normal) with mean $\mu=59$ and SD $\sigma=8$. Let $\bar{X}=\frac{1}{81}\Sigm... | 5 | [
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0.034423828125,
0.052978515625,
-... | 10,658 | 10658 | |
Real number
In mathematics, the real numbers may be described informally as numbers that can be given by an infinite decimal representation, such as 2.4871773339.... The real numbers include rational numbers,
such as 42 and −23/129, and irrational numbers, such as π and the square root of 2, and can be represented as ... | 4 | [
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-0.000789642333... | 10,659 | 10659 | |
Math Forum Discussions
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Topic: sum of csc
Replies: 0
stainburg sum ... | 4 | [
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0.046875,
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-0.054931640625,
0.03173828125,
-0.06494140625... | 10,660 | 10660 | |
[SciPy-Dev] stats.distributions.py documentation
Ralf Gommers ralf.gommers@gmail....
Fri Sep 21 14:27:14 CDT 2012
On Sun, Sep 16, 2012 at 11:10 PM, nicky van foreest <vanforeest@gmail.com>wrote:
> Hi,
>
> Below are two proposals to handle the documentation of the scipy
> distributions.
>
> The first is to add a set ... | 5 | [
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-0.0... | 10,661 | 10661 | |
On internal functions and arrows in a Topos
up vote 6 down vote favorite
1
I am not an expert on elementary topos (meaning by this to work with the internal language in a Grothendiek topos) and I rather be told than struggle with the following:
Consider an elementary topos $\mathcal{E}$, a locale $G$, the unique loca... | 4 | [
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0.04248046875,
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-0.0205078125,
-0.04516... | 10,662 | 10662 | |
Posts from February 2011 on ISourceCode
Make the frequent cases fast and the rare case correct
Monthly Archives: February 2011
Posted by on February 28, 2011
In mathematics, the Fibonacci numbers are the numbers in the following integer sequence:
the sequence Fn of Fibonacci numbers is defined by the recurrence rel... | 5 | [
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-0.11181640625,... | 10,663 | 10663 | |
I
Introduction
To be able to perform arithmetic, you must first be familiar with numbers. Therefore, although we give a few helping examples, this article is not about binary numerals.
The main interactive circuit at the top of this page is an arithmetic circuit capable of performing both addition and subtraction on... | 4 | [
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0.10400390625,... | 10,664 | 10664 | |
Equation for parallel and perpendicular lines
August 8th 2009, 12:15 PM #1
Junior Member
Joined
Jan 2009
Posts
26
Equation for parallel and perpendicular lines
Need some help with this one.
Let L represent the line y = (-4/3)x + 2. Write an equation for the line through p(9,-7) that is parallel to L... | 4 | [
-0.11083984375,
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0.00238037109... | 10,665 | 10665 | |
Higher order functional boundary value problems without monotone assumptions
Abstract
In this paper, given a -Carathéodory function, it is considered the functional higher order equation
together with the nonlinear functional boundary conditions, for
Here, , , are continuous functions. It will be proved an exi... | 5 | [
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[SciPy-User] Troubles with odeint or ode
Anne Archibald peridot.faceted@gmail....
Tue Nov 3 13:28:09 CST 2009
2009/11/3 ANDREA ARMAROLI <rmrndr@unife.it>:
> Dear users,
>
> I'm trying to solve an ODE system that models a parametric oscillator with
> complex amplitudes at two freqencies.
>
> I'm new to python. This pr... | 4 | [
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-0.0458984375,
-0.029... | 10,667 | 10667 | |
Related Rates Word Problem with Derivation
October 7th 2009, 07:34 PM
Maziana
Related Rates Word Problem with Derivation
I keep getting the wrong answer to this related rate problem, so I would greatly appreciate it if someone could go over my work and tell me where I messed up and why. I'm not sure if I made a
... | 5 | [
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0.036865234375,
... | 10,668 | 10668 | |
Inequalities on a Number Line
Date: 05/07/2003 at 21:46:02
From: Gayle
Subject: How do you graph inequalities on a number line?
Will you please give me an example how to graph an inequality on a
number line?
all real numbers less then 2
all real numbers greater then -3
all real numbers less then or equal to -1... | 4 | [
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-0... | 10,669 | 10669 | |
Integration using given substitution difficulty.
February 10th 2013, 10:46 AM
Furyan
Integration using given substitution difficulty.
Hello again,
Just when I think I'm getting it I realize I'm really not.
I have no idea how to approach this question, I have a bunch like this to do and would really app... | 4 | [
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... | 10,670 | 10670 | |
Probability in Flipping Coins
Date: 2/25/96 at 19:16:27
From: Dana Kaye
Subject: Probability Question
I am looking for some help with a couple of probability questions.
On Friday we had a substitute teacher who explained probability
to us and gave us some questions. Since we share textbooks at
school we can't take ... | 4 | [
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Minimizing the expected value of a density function
November 16th 2010, 08:40 PM
Zennie
Minimizing the expected value of a density function
Let X be a continuous random variable with probability density function f(x). Determine the value of y for which E(|X - y|) is minimum.
Not sure where to even begin. An... | 5 | [
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The Mechanical Vivarium of Dr. Iguana
Easy Flat-Pack Fresnel Reflector
Fresnel reflectors consist of concentric mirrored rings. Each ring is tilted inward by a precise angle. Any light falling on the ring from above is reflected toward a central focal point. The angle
of the tilt needs to be quite precise and this mak... | 4 | [
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rational equations
Determine the point of intersection of the following two rational functions, algebraically. r(x)= $x/(3x^2+3)$ s(x)= $1/(2x^2-8)$ Thank you
The point of intersection is going to be defined by $r(x) = s(x)$ for some values of x. So: $\frac{x}{3x^2 + 3} = \frac{1}{2x^2 - 8}$ Cross multiply (or, more p... | 4 | [
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-0.0532226562... | 10,674 | 10674 | |
[SOLVED] Twist on Work Rate Problem
March 19th 2007, 07:41 PM
Paul B
[SOLVED] Twist on Work Rate Problem
I am trying to show my students a different slant on a work rate problem and I want to make sure I show them the best method.
Working together, Nina and Lauren can mow the lawn in 2 hours. It takes Nina ... | 4 | [
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0.0046081542... | 10,675 | 10675 | |
Math - Intersection of planes
Posted by Shaila on Wednesday, September 1, 2010 at 3:08am.
Find the vector equation of the line of intersection for the pair of planes.
Plane one: x+5y-3z-8=0
Plane two: y+2z-4=0
I did half of the work but now i am stuck.
the normal of the planes are not parallel and therefore a solu... | 4 | [
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-0.1279296875,
-0.09375,
-0.0... | 10,676 | 10676 | |
Probability Problems...
October 25th 2009, 08:57 AM #1
Newbie
Joined
Oct 2009
Posts
2
Probability Problems...
Suppose we are interested in the condition of a machine that produces a particular item. Let A designate the event "the machine is in good working condition". Let B be the event "the machine is
... | 4 | [
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0.05859375,
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0.0244140625,
0.00579833984375,
0.01483154296875,
0.039794921875,
-0.02856445312... | 10,677 | 10677 | |
Tetrachoric and Polychoric Correlation Coefficients
Introduction to the Tetrachoric and Polychoric Correlation Coefficients
John S. Uebersax
Go to Agreement Stati... | 5 | [
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0.021... | 10,678 | 10678 | |
Schreiber
Contents
This text is a first introduction to homological algebra, assuming only very basic prerequisites. For instance we do recall in some detail basic definitions and constructions in the theory of abelian
groups and modules, though of course a prior familiarity with these ingredients will be helpful. Als... | 4 | [
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-0.040771484375,
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0.05615234375,
-0.01397705078125,
-0.07177734375... | 10,679 | 10679 | |
Freezer Roulette
Date: 07/26/2002 at 11:14:26
From: Kev
Subject: Probability or logic?
Two people are trapped in a small freezer that is gradually getting
colder and colder. There are four walls, each with a small button
in the centre.
Each person can reach only one button, allowing either one or two
buttons to be p... | 4 | [
0.01031494140625,
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-0.045166015625,
-0.046875,
... | 10,680 | 10680 | |
How many edge-disjoint paths go from upper left to lower right in a $4 \times N$ rectangular gridwork of streets?
up vote 9 down vote favorite
2
Background/Motivation
My interest in this problem traces back to an 11 year old girl who really took to one-way path counting problems. After doing several configurations of... | 5 | [
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-0.05419921875,
0.08837890625,
0.04638671875,
-0.0115356... | 10,681 | 10681 | |
Factoring Polynomials (need HELP!!!)
Posted by Emily on Wednesday, January 10, 2007 at 11:24pm.
Ok, this is pretty long, so bear with me.
The problem says:
The diagram (not shown here, sorry) shows a cube of metal with a cylinder cut out of it. The formula for the volume of a cylinder is V=pi*r^2*h, where r is the r... | 4 | [
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0.0301513671875,
-0.028564453125,
0.0260009765625,
0.09765625... | 10,682 | 10682 | |
Galois Theory: Infinite Galois Theory
So far I’ve only discussed finite Galois theory, that is the Galois theory of finite extensions. But there’s also an infinite theory; the extensions it studies are separable and normal, just like
finite Galois extensions, but the fundamental theorem needs to be modified to apply. ... | 4 | [
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-0.080078125,
0.0234375,
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0.0172119140625,
0.034912109375,
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-0.01531982421875,
0.0732421875,
-0.08154296875,
0.05419921875,
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0.00009679794311523438,
-0.0189208984375,
0.01275634765625,
-0.032470703125,
0.... | 10,683 | 10683 | |
Roots and the Bisection Method
Date: 08/01/98 at 21:27:12
From: JCG
Subject: Polynomials
What is the Bisectional Method? How would I solve 2x^3+x^2+5x+2 = 0
or any other polynomial? Can the method be used by something greater
than the 3rd degree?
Date: 08/05/98 at 14:30:39
From: Doctor Benway
Subject: Re: Polynomi... | 4 | [
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The Science of Restoring and Balancing – The Science of Algebra
Muslim contributions in the field of mathematics have been both varied and far reaching. This article by Mahbub Ghani (from the Department of Electronic Engineering at King's College, London
University) considers some Muslim contributions in algebra, focus... | 4 | [
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More Differential Eqns
May 4th 2009, 06:47 PM #1
Newbie
Joined
May 2009
Posts
16
More Differential Eqns
Let v(t) be the velocity, in feet per second, of a skydiver at time t seconds, t>0. After her parachute opens, her velocity satisfies the differential eqn
dv/dt = -2v-32,
with initial conditi... | 5 | [
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-0.00775146... | 10,686 | 10686 | |
"Mathematical Logic" by Cori and Lascar: Incomplete proof of Lemma 1.9?
June 3rd 2011, 06:43 AM
omoplata
"Mathematical Logic" by Cori and Lascar: Incomplete proof of Lemma 1.9?
I have a question on the book "Mathematical Logic: Propositional calculus, Boolean Algebras, predicate calculus" by Rene Cori and Daniel... | 5 | [
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... | 10,687 | 10687 | |
Smaller vs. Larger Exponents and Numbers
Date: 03/24/2003 at 12:54:07
From: Toni
Subject: Numbers and exponents
Is a smaller number with a large exponent greater than a larger
number with a smaller exponent?
Using the numbers 1,2,3,4 what is the largest number you could make?
I'm thinking of 2^431 or 21^43.
Date: ... | 4 | [
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0.028076171875... | 10,688 | 10688 | |
GCD Multiplicative Property
May 3rd 2009, 03:38 PM #1
Junior Member
Joined
May 2009
Posts
36
GCD Multiplicative Property
i'm reading Introduction to Analytic Number Theory, Tom M. Apostol and i have a doubt about an exercise in chapter 1. Follow the exercise:
Prove the following multiplicative prope... | 4 | [
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0.01092... | 10,689 | 10689 | |
Math help - square roots?
December 10th 2009, 04:35 AM #1
Newbie
Joined
Dec 2009
From
Eastern Coast
Posts
1
Math help - square roots?
Hi!
I'm having some trouble with square roots -
I understand the square root of numbers like 49 (7), 9 (3) and all, though I'm very confused with finding the ... | 4 | [
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... | 10,690 | 10690 | |
Order of Operations for Solving Equations
Associated Topics || Dr. Math Home || Search Dr. Math
Order of Operations for Solving Equations
... | 4 | [
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Domain and Range of Rational Functions
Top
In a rational function, the domain of function f (t) is basically the set of values, where by putting the values of ‘t’ in function, f(t) is always real. The range of function f (t) is basically a
set of values, where the function f(t) takes, when the variable ‘t’ takes value... | 4 | [
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-0.03955... | 10,692 | 10692 | |
polar coordinate
Find the area of the region inside: $r = 8 \sin \theta$ but outside $r = 4$
First find the points of intersection. So $8 \sin \theta = 4, \ \sin \theta = \frac{1}{2}$ or $\theta = \frac{\pi}{6}, \ \frac{5 \pi}{6}$. So $A = \frac{1}{2} \int_{\frac{\pi}{6}}^{\frac{5 \pi}{6}}
(8 \sin \theta)^2 \ d \theta... | 5 | [
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Find the volume of the solid.
December 12th 2010, 07:25 PM
dmbocci
Find the volume of the solid.
I'm stuck on this problem. The answer is probably obvious, but I second guess myself a lot.
Find the volume of the solid below z=sqrt((x-y)(x+4y)), above the parallelogram in the x-y plane with vertices (0,0)(1,... | 5 | [
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Maxima and Minima of Functions of Two Variables
Locate relative maxima, minima and saddle points of functions of two variables. Several examples with detailed solutions are presented. 3-Dimensional graphs of functions are shown to confirm the
existence of these points. More on Optimization Problems with Functions of Tw... | 5 | [
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construct a power series with infinitely many zeros in the complex plane, bounded coefficients???
up vote 0 down vote favorite
Hi all.
I want to construct a power series $F(z)=\sum_{n=0}^\infty c_nz^n$ centered at zero and with finite radius of convergence in the complex plane, and which has infinitely many zeros (in... | 5 | [
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Model with First Order Differential Equation
May 31st 2011, 08:48 AM #1
Junior Member
Joined
Jul 2008
Posts
74
Model with First Order Differential Equation
Dear all,
I'm having some trouble with the following question involving modelling with a first-order differential equation. My solution is below... | 5 | [
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Pulsar
Pulsar Properties
For additional information about pulsars, see the books Pulsar Astronomy by Andrew Lyne and Francis Graham-Smith and Handbook of Pulsar Astronomy by Duncan Lorimer and Michael Kramer.
Known radio pulsars appear to emit short pulses of radio radiation with pulse periods between 1.4 ms and 8.5... | 4 | [
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Murder Mystery: A Project for Logarithms
[Note added on 2-7-14: This is one of my most-read posts. If it helps you design a good project for your class, that's great. Please do not use it as is. Make adjustments for the age of your students
(mine are in college), and fill in the details where I've put notes in brackets... | 4 | [
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