content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
Approximation and error
October 9th 2011, 02:50 AM #1
Junior Member
Joined
Apr 2010
Posts
26
Approximation and error
f(x)= x^2 -2x +3
a tangent at x=2 is y=2x=1
The tangent line is used to approximate values of f(x). A satisfactory approximation occurs if the resulting error is at most 0.4
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0.02001953125,
-0.0068969726... | 34,400 | 34400 | |
Common Core Standards : CCSS.Math.Content.HSG-CO.B.7
Common Core Standards: Math
Math.CCSS.Math.Content.HSG-CO.B.7
7. Use the definitions of congruence in terms of rigid motions to show that two triangles are congruent if and only if corresponding pairs of sides and corresponding pairs of angles are congruent.
Stude... | 4 | [
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-0.0250244... | 34,401 | 34401 | |
Number system Problem
July 16th 2012, 11:02 PM #1
Newbie
Joined
Jul 2012
From
Delhi
Posts
12
Number system Problem
If N= 144 How many sets of two values (a,b) are there for which the LCM (a,b) is 144 ??
What the general formula for this (with proof) ??
Re: Number system Problem
Note that $... | 4 | [
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Homework Help
Posted by Nora on Tuesday, December 27, 2011 at 3:37am.
One side of the rectangle lies along the line 4x+7y+5=0 , two of its vertices are (-3,1)and (1,1). find
(i) the equations of the other three sides.
(ii) the angle between the two diagonals of the rectangle .
(iii) the area of the rectangle.
• ... | 4 | [
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Maximum area of an area within y=x^2
July 17th 2009, 02:36 PM #1
Newbie
Joined
Jul 2009
Posts
1
Maximum area of an area within y=x^2
I've got this problem that I'm trying to solve, I've been twisting my brain for several hours now.
An area 'A' is limited by the curve y=x^2, the x-axel and the line ... | 5 | [
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-0.019042968... | 34,404 | 34404 | |
General Solution Eigenvale
November 3rd 2007, 01:34 PM #1
Member
Joined
Sep 2007
From
Calgary, Alberta
Posts
77
General Solution Eigenvale
I'm reading my textbook, in the Diagonalization and Eigenvalues section, and am wondering how they get this...
"λI-A = $\left(\begin{array}{ccc} -5 & -5\\ -1... | 5 | [
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-0.0257568... | 34,405 | 34405 | |
MacLaurin series/Ratio test.
May 19th 2012, 02:03 AM #1
Newbie
Joined
Apr 2012
From
Bath
Posts
9
Thanks
1
For f(x) = loge(1-x)
Clarification: The question isn’t loge(1+x), it’s loge(1-x)
a) Find the MacLaurin series: f(0) +f'(0)x + f''(0)/2! + f'''(0)/3!....etc
My question is, to wha... | 5 | [
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speed - distance catching up
February 5th 2008, 02:13 AM #1
speed - distance catching up
A speeding motorbike travels past a stationary police car. The police car starts accelerating immediately, and keeps accelerating until it has passed the bike.
DATA: motorbike speed: $35ms^{-1}$; police car acceleration:... | 5 | [
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Math Help
April 17th 2007, 10:28 AM #1
Newbie
Joined
Feb 2007
Posts
23
Indices
1.) Find all the solutions of 4^(x) = 13 (mod 17) using indices.
Then, let m be a pos. integer w/ a primitive root r. Also, let a be a pos. integer w/ gcd(a,m) = 1. Through 2.) and 3.), you'll investigate the relationshi... | 5 | [
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st
The laws of nature state if you want something you have to pay for it. In a pump, liquid horsepower is inputted and converted to velocity energy by the impeller, then converted to pressure energy in
the diffuser section of the volute case to push liquid through the piping to the sprinkler or holding tank or cooling ... | 4 | [
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Algebra modulus problem
September 17th 2012, 12:06 PM #1
Newbie
Joined
Sep 2012
From
Edinburgh
Posts
2
Algebra modulus problem
I am having problems with the following :
Z +|Z|^2 = 10-2i (the solution must be in the form a+bi)
I have gotten to :
a +bi + a^2 +b^2 = 10 -2i
and cannot... | 4 | [
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Finding the slope/equation of the tangent line
December 10th 2006, 11:02 AM #1
Newbie
Joined
Nov 2006
Posts
13
Finding the slope/equation of the tangent line
No clue how to do these, missed class(sick ughhhh) and I'm trying to catch up on the example problems since we have a test in a couple weeks. If I ... | 4 | [
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Abelian Factor Group
November 29th 2007, 09:17 PM #1
Newbie
Joined
Nov 2007
Posts
10
Abelian Factor Group
Question: Let G be a group and N be a normal subgroup of G. Show that the factor group G/N is abelian iff aba^-1b^-1 is in N for all a,b in G.
If G/N is abelian then Na*Nb = Nb * Na and Naa^-1bb... | 5 | [
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Homework Help
Posted by MAKITA on Friday, April 10, 2009 at 11:57pm.
1.)Find the exact solution algebriacally, if possible:
(PLEASE SHOW ALL STEPS)
sin 2x - sin x = 0
2.) GIVEN: sin u = 3/5, 0 < u < ï/2
Find the exact values of: sin 2u, cos 2u and tan 2u
using the double-angle formulas.
3.)Use the half-angle for... | 4 | [
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Math-Algebra 1
Posted by Gabby on Saturday, November 23, 2013 at 2:28pm.
Part 1: When writing linear equations, how do you determine which form of a line to use?
Part 2: Choose 1 set of points from the choices below. Then, solve the problem and post your solution, showing your steps.
Write an equation in point-slope... | 4 | [
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Studying for final and need help with Related Rates
December 18th 2007, 09:34 AM #1
Studying for final and need help with Related Rates
I hate word problems and I pretty much suck when it comes to them. Here's one that I got stuck at.
1) A man starts walking north at 4ft/s from a point P. Five minutes later ... | 5 | [
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Simulated Annealing in Julia
Building Optimization Functions for Julia
In hopes of adding enough statistical functionality to Julia to make it usable for my day-to-day modeling projects, I’ve written a very basic implementation of the simulated annealing (SA) algorithm,
which I’ve placed in the same JuliaVsR GitHub re... | 5 | [
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Probability Assignment: Help please!
February 3rd 2010, 06:18 PM
MathGuy1
Probability Assignment: Help please!
Hi all,
I'm working on a math assignment for a class, and am stuck on a question. It reads:
Suppose an experiment has independent events A, B, and C such that:
P(A | C) = 0.4
P(B | C) =... | 4 | [
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Math Help
Solve for I made it into log2x9/2=-3 2-3=x9/2 .125x-4.5=x -0.5625=x but I don't think it's right
$\frac{9}{2} \log_2{x} = -3$ $\log_2{x} = -\frac{2}{3}$ $x = 2^{-\frac{2}{3}} = \frac{1}{\sqrt[3]{4}}$
Skeeter's method, dividing both sides by 9/2 first, is simpler than yours but it can be done your way: $\fr... | 4 | [
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Latin American applied research
Serviços Personalizados
Artigo
Indicadores
Links relacionados
Bookmark
versão On-line ISSN 1851-8796
Lat. Am. appl. res. vol.40 no.2 Bahía Blanca abr. 2010
... | 4 | [
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NovoSPT User's Manual - Bearing Capacity - Theory
Meyerhof, 1976 (based on 25mm settlement)
The allowable bearing capacity based on the SPT test according to Meyerhof is:
qa=N[60].Kd/F1 Bآ£F4
... | 4 | [
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Fuzzy unification parser in Haskell
Synopsis
This is a short paper on building a scanner/parser for a fuzzy logic domain-specific language (DSL). The system takes as input a file containing an ordered set of fuzzy statements and outputs the
equivalent Prolog program. We first briefly and informally introduce the topic... | 4 | [
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Proof of the Associative Law of Symetric Difference
September 3rd 2012, 07:03 PM #1
Newbie
Joined
Sep 2012
From
oxford,ms
Posts
3
Proof of the Associative Law of Symetric Difference
Hi there,
I have to prove using Element Chasing that (A delta B) delta C = A delta ( B delta C)
I have the Venn... | 5 | [
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Mathematics regarding infinite series, hypergeometric function, gamma function, pi formula, universal constants by Cetin Hakimoglu-Brown
New Work:
The stock market equilibrium equation (for evenly distributed volume) is an attempt to develop a mathematical framework for describing how stocks trade by converting ch... | 4 | [
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How to solve for a variable in a quadratic function with 2 variables?
October 23rd 2011, 03:49 PM #1
Member
Joined
Oct 2011
Posts
153
How to solve for a variable in a quadratic function with 2 variables?
The problem is f(x)=x^2+3bx-b^2+1
I'm suppose to get the value of 'b'
What I started off was... | 4 | [
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Combinatorics Calculator
Combinations Calculator
This calculator determines the number of ways to select
y
out of
x
items when the order in which they are selected does not matter.
Variable Description Value
x Total number of items
y Number of items chosen
... | 5 | [
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Complex numbers: Equation containing power and conjugate
September 11th 2012, 02:41 AM #1
Newbie
Joined
Sep 2012
From
Greece
Posts
16
Complex numbers: Equation containing power and conjugate
I am asked to solve $z^3 + conjugate(z) = 0$
I have already attempted to solve it by replacing z with x + ... | 5 | [
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lines an equations
January 14th 2006, 09:08 AM #1
ok another question...
i need to find out an equation of a line that contains the point (-2,5) and is parallel to the line y=4x-3
if someone could pls tell me how to go about this it would be very helpful cuz as usual im stuck!
If the equation of a l... | 4 | [
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0.046875,
-0.00628662109375,
0.033935546875,
0.064453125,
0.04736328125,
0.10498046875,
-0.1328125,
-0.032470703125,
-0... | 34,427 | 34427 | |
Joint Uniform Distrubtion of 3 variables problem
January 6th 2011, 01:43 PM #1
Junior Member
Joined
Aug 2010
Posts
53
Joint Uniform Distrubtion of 3 variables problem
Hi all,
I am working through a problem but I cant seem to see the method... the answer is in the back of the text book but no method!... | 5 | [
-0.01275634765625,
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the encyclopedic entry of gauss
In physics, Gauss's law, also known as Gauss's flux theorem, is a law relating the distribution of electric charge to the resulting electric field. It is one of the four Maxwell's equations, which
form the basis of classical electrodynamics, and is also closely related to Coulomb's law. ... | 4 | [
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Trigonometric equations and their solutions
August 16th 2010, 11:25 AM #1
Newbie
Joined
Aug 2010
Posts
23
Trigonometric equations and their solutions
π=pi - format looks like an n =/
sinx=1/2
x=π/6 and x=π-π/6=5π/6
x=π/6+2nπor x=5π/6+2nπ
now the next problem does:
sinx=-1/2
... | 4 | [
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... | 34,430 | 34430 | |
Showing a subset does not form a subgroup (explaination wanted)
October 10th 2009, 08:57 AM #1
Showing a subset does not form a subgroup (explaination wanted)
If not sure how to show that a subset does not form a subgroup. Here is the example:
Let $G=GL_2(<b>R</b>)$. Show that the subset S of G defined by
... | 5 | [
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Percentage help
August 7th 2009, 09:38 PM #1
Newbie
Joined
Aug 2009
Posts
2
Percentage help
In a certain town, three newspapers are published. 20% read A, 16% percent read B, 14% read C. 8% read both A and B, 5% of the read both A and C, 4% read both B and C and 2% read all 3
newspapers.
What pe... | 4 | [
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Trig Word Problem, Need Help
November 18th 2008, 01:54 PM
Vivin Spinach
Trig Word Problem, Need Help
Two spotlights, one blue and the other white, are placed 6.0m apart on a track on the ceiling of a ballroom. A stationary observer standing on the ballroom floor notices that the angle of
elevation is 45 degr... | 4 | [
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Find the derivative
February 5th 2009, 07:23 PM
TastyBeverage
Find the derivative
Darn professors....wish mine explained things...
How do I find f`(a) for $f(x) = (3x +1)^{1/2}$
Thats the square root of 3x+1, double thanks to someone who shows me how to put that in there.
I have only seen f(x) - f... | 5 | [
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Prime factors
November 27th 2010, 02:53 AM
Glyper
Prime factors
There are given different odd prime numbers $p$ and $q$. Prove that number $2^{pq} -1$ has at least 3 different prime factors.
From what I found in an algebra book:
$a^n\,-\,b^n \;=\;(a\,-\,b)\,(a^{n-1}\,+\,a^{n-2}b\,+\,a^{n-3}b^2\,+\,\cdot... | 5 | [
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-0.082... | 34,435 | 34435 | |
Forming a Cubic Equation from Roots
September 13th 2010, 01:38 PM #1
Forming a Cubic Equation from Roots
Stuck on a further pure question, asked one of my maths teachers today but she hadn't done most of the paper in 20 years.
Here's the question:
Given that the roots of the cubic equation
$x^3+4x^2+3... | 4 | [
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0.021484375,
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0.04736328125,
0.032470703... | 34,436 | 34436 | |
Basic u substitution help
August 10th 2009, 04:10 AM #1
Basic u substitution help
Hello,
I need to evaluate $\int_{0}^{1}x^{16}\times e^{x^{8.5}}$
So i figured i let $\left \{\begin{array}{rcll}u = x^{8.5} & \\<br /> \text{then}~u^2 = x^{17} & \\<br /> du^2 = 17x^{16}\end{array} \right.$
$\frac{1}{... | 5 | [
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0.013... | 34,437 | 34437 | |
Homework Help
Posted by sarah on Sunday, June 14, 2009 at 1:40pm.
a pile drive has a 413 kg block that is lifted 1.4m and then dropped onto the pile being driven into the ground. suppose that it takes 24ms to stop when it hits the pile. what is the average force
exerted on the pile by the pile driver?
• physics - d... | 4 | [
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Square number
April 8th 2012, 07:14 AM #4
Super Member
April 8th 2012, 05:39 AM #3
Member
April 8th 2012, 05:24 AM #2
April 8th 2012, 05:05 AM #1
Member
Re: Square number
Hello, Mhmh96
You may have missed the point of Sylvia's hint . . .
Look at what we have:$(123456)^2 + 123456 + 123457$ . . $=\;(... | 4 | [
-0.018798828125,
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Prove that f is injective
December 4th 2012, 07:25 AM #1
Junior Member
Joined
Nov 2012
From
Poland
Posts
40
Prove that f is injective
Hello,
I need to prove that function defined like this $f:X->Y$ for any two given sets X,Y is one-to-one if and only if $f(A \cap B)= f(A) \cap f(B)$, where $A,B \... | 5 | [
0.0047607421875,
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-0.0400390625,
-0.0776367187... | 34,440 | 34440 | |
Analytical Geometry
June 20th 2006, 10:56 AM #1
Newbie
Joined
Jun 2006
Posts
10
Analytical Geometry
Hey guys.
I need lots of help.
I need to find out how to do these questions: Answers (showing your work, like how to get the answer) would be really great. I'm really stuck with this stuff. And its... | 4 | [
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0.00390625,
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-0.0... | 34,441 | 34441 | |
the encyclopedic entry of duplation
Ancient Egyptian multiplication
is a systematic method for multiplying two numbers that does not require the
multiplication table
, only the ability to multiply and
divide by 2
, and to
add
. Also known as
Egyptian multiplication
and
Peasant multiplication
, it decomposes ... | 4 | [
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0.1806640625,
-... | 34,442 | 34442 | |
0041-6932 0041-6932 S0041-69322008000200010 Argentina 00 12 2008 00 12 2008 49 2 97 110 Hypergeometric functions and binomials
Alicia Dickenstein
Abstract. We highlight the role of primary decomposition of binomial ideals in a commutative polynomial ring, in the description of the holonomicity, the holonomic rank, an... | 4 | [
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-0.050537109375,
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-0.072265625... | 34,443 | 34443 | |
5 Sigma: Writeup For Festivaletteratura
On Friday evening I will be talking in the wonderful Piazza Mantegna, in downtown Mantova (see picture below). It is an event organized by Festivaletteratura (literature festival), where I will be
armed with blackboard and chalks, plus a mike, and where I will explain the way a d... | 4 | [
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0.0286865234375,
0.0184326171875,
... | 34,444 | 34444 | |
Heat Equation PDE
February 14th 2011, 04:04 PM #1
Newbie
Joined
Jan 2010
Posts
5
Heat Equation PDE
Show that if $u(x,t)$ is a solution of $u_{t}=u_{xx}$, then so is
$v(x,t)=t^{\frac{-1}{2}} e^{\frac{-x^{2}}{4t}}u(\frac{x}{t},-\frac{1}{t})$
I'm assuming that I should simply show $v_{t}=v_{xx}$ ho... | 4 | [
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... | 34,445 | 34445 | |
Quick Calc Question
Posted by Michael on Sunday, November 4, 2007 at 4:18pm.
I can't remember how to integrate ye^ey with respect to y. Is it (y^2)e^xy? or do i need to do integration by parts? i just cant remember.
• Quick Calc Question - Michael, Sunday, November 4, 2007 at 4:24pm
oops, that was supposed to ... | 5 | [
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... | 34,446 | 34446 | |
[SOLVED] How to find using integration, the area of a circular sector with an angle,x
Equation of the circle is x^2 + y^2 = r^2 and the sector's angle = x
you're mixing variables ... $x^2+y^2=r^2$ is a circle of radius $r$ centered at the origin. x represents the x-coordinate of any point on the circle, so it cannot r... | 5 | [
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-0.024658203125,
-0.04345703125,
0.0336914062... | 34,447 | 34447 | |
inside-R
lu {Matrix}
(Generalized) Triangular Decomposition of a Matrix
Description
Computes (generalized) triangular decompositions of square (sparse or dense) and non-square dense matrices.
Usage
lu(x, ...)
## S4 method for class 'matrix':
lu((x, warnSing = TRUE, ...))
## S4 method for class 'dgeMatrix':
lu((... | 4 | [
-0.04296875,
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0.01519775390625,
... | 34,448 | 34448 | |
Principal curvatures of a surface
June 28th 2009, 12:04 AM
Kiwi_Dave
Principal curvatures of a surface
Find the equations of the principal curvatures of the surface:
x=u, y=v, z=f(x,y)
I can see a method to do this but it looks like it will be algebraically difficult if not impossible. Can you suggest... | 4 | [
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-0.1015625,
-0.0022... | 34,449 | 34449 | |
3 Physics Questions
November 18th 2007, 10:34 AM #1
Newbie
Joined
Nov 2007
Posts
7
3 Physics Questions
1. You want to launch a satellite into a circular orbit at an altitude of 16,000 km (above Earth's surface). What launch speed will be required?
A: 1.0 x 10^4 m/s
2. In a joint international e... | 5 | [
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0.037109375,
0.0212... | 34,450 | 34450 | |
What is complex slope of a line in complex numbers
February 7th 2009, 06:46 AM #1
What is complex slope of a line in complex numbers
If equation of a line in complex plane is given by
$<br /> \bar az+a\bar z+b=0<br />$
where $a$ is a complex constant and $b$ is a real number
Then complex slope of the ... | 4 | [
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... | 34,451 | 34451 | |
Homework Help
Posted by gf on Wednesday, November 7, 2007 at 12:01am.
Please help me with these problems. Work and answer is appreciated! :) thanks.
1. Find on the interval theta is greater than or equal to 0 and less than 2pi; then find the general solution:
5tantheta+1=-2.89
16cos^2theta-6=3
6sin^2theta+sintheta... | 4 | [
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-0.0380859375,
-0.07910... | 34,452 | 34452 | |
Need help with Trivial/Non trivial solution
April 5th 2010, 03:06 PM
supersaiyan
Need help with Trivial/Non trivial solution
http://i43.tinypic.com/s1n3fl.jpg
The questions asks for what value of Z does your set of equations have a non trivial solution?
I am not even sure how to begin.. any hints?
April... | 4 | [
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-0.021484375,
-0.0942382... | 34,453 | 34453 | |
Copper Wire
April 25th 2010, 07:28 PM
BrendanLoftus
Copper Wire
How many feet of copper wire 1/8 inches in diameter can be made from 1 cu. ft. of copper?
given; pi=3.14; 1 cu. ft.= 7.5 gallons; 1 gal= 231 cu. inches
I figured 1 cu. ft.=1732.5 cu.in.
Any help would be greatly appreciated.
April 2... | 4 | [
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0.044189453125,
0.0133056640625,
0.05810546875,
-0.0111083984375,
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-0.050048828125,
0.03979492187... | 34,454 | 34454 | |
Statistics Class: How I Will Calculate Your Probability of Winning the Exploits Giveaway
Statistics and Probability is a fundamental knowledge that should be inside each Software Engineer, and here I will show you some of its wonders.
Some of you are already saying “hi” and posting pictures to boost your possibility t... | 5 | [
-0.057861328125,
0.0029144287109375,
-0.03369140625,
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0.0089111328125,
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0.1328125,
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0.0277099609375,
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0.03564453125,
-0.056... | 34,455 | 34455 | |
Radioactive Logarithim
October 5th 2012, 11:50 PM #1
Newbie
Joined
Oct 2012
From
Melbourne
Posts
2
Radioactive Logarithim
Hey guys, just found this forum after searching for days about this problem I've got. No where seems to have any relevant answers so I thought I might ask a forum for some help.
... | 4 | [
-0.0303955078125,
0.035400390625,
0.033935546875,
-0.003265380859375,
-0.060791015625,
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-0.10986328125,
0.0478515625,
0.126953125,
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0.09033203125,
0.001678466796875,
0.0361328125,
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0.029... | 34,456 | 34456 | |
Homework Help
Posted by Anonymous on Wednesday, December 7, 2011 at 10:58am.
perform the indicated operation and if possible simplify. (2x+4y)/(2x^2+5xy+2y^2)*(4x^2-y^2)/(8x^2-8)÷(x^2+4xy+4y^2)/(x^2-6xy+9y^2)
i dont understand this the answer is (2x-y)(x-3y)^2/4(x-1)(x+1)(x+2y)^2
• Urgent math - Reiny, Wednesday, ... | 4 | [
-0.0289306640625,
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... | 34,457 | 34457 | |
Permutations help me please
July 12th 2008, 12:40 AM #1
Permutations help me please
Hi i need urgent help please , i don't know where this topic belongs on this forum since it seems kinda miscellaneous. Sorry to ask so much for a 1st post.
Q1) A car registration consists of 3 letters following by a number be... | 4 | [
0.0498046875,
-0.08544921875,
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0.0234375,
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... | 34,458 | 34458 | |
Help with algebra equations
June 16th 2008, 12:12 PM
gram1210
Help with algebra equations
Hi, I'm having trouble doing two equations. I have no idea where to start on (or how to go about doing) the 1st one, and the 2nd - well I've endlessly tried many different ways, however it always
ends up coming out wron... | 4 | [
-0.08544921875,
0.078125,
0.072265625,
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0.022705078125,
-0.098144... | 34,459 | 34459 | |
the encyclopedic entry of Exponential_sum
In
mathematics
, an
exponential sum
may be a finite
Fourier series
(i.e. a
trigonometric polynomial
), or other finite sum formed using the
exponential function
, usually expressed by means of the function
$e\left(x\right) = exp\left(2pi ix\right)$.
Therefore a ... | 4 | [
-0.138671875,
0.007110595703125,
-0.04150390625,
0.07275390625,
0.016357421875,
0.0272216796875,
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0.150390625,
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0.0228271484375,
0... | 34,460 | 34460 | |
Math Help
December 2nd 2008, 04:13 AM #1
Newbie
Joined
Oct 2008
Posts
20
Maxima/Minima
A can of beans has internal radius r and height h. Given that Surface area is S = 2 pi r ( r + h ) and this is equal to 120 pi. Determine r and h such that the volume of beans in the can is a
maximum.
Hello, ... | 5 | [
-0.0034027099609375,
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0.00671... | 34,461 | 34461 | |
Fluid Mechanic Integration
July 19th 2010, 06:24 AM #1
Newbie
Joined
Feb 2010
Posts
24
Fluid Mechanic Integration
I have a fluid mechanics question, i don't know which equation i should integrate and how?
For turbulent flow in a smooth, circular tube with a radius R, the velocity profile varies acco... | 5 | [
0.02880859375,
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0.038... | 34,462 | 34462 | |
Wilson's theorem
May 16th 2012, 03:44 PM #1
Member
Joined
Apr 2008
Posts
137
Thanks
4
Wilson's theorem
Hi,
Would the following constitute a proof of "if n is compositie then (n-1!)=0 mod n"
We can use the chinese remainder theorem to find $(n-1) mod n.$
Suppose that $n = p_{1}^{a1}, p_... | 5 | [
-0.11181640625,
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0.0257568359375,
0.0078125,
-0.0147705078125,
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-0.04443359375... | 34,463 | 34463 | |
Different way to express this set
February 18th 2011, 04:15 PM #1
Member
Joined
Feb 2011
Posts
83
Thanks
2
Different way to express this set
The set is (A union B) intersect C.
I was wondering if there was another way to write this that is not
(A intersect C) union (B intersect C)
I wa... | 4 | [
0.050048828125,
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Curvature of implicit equation
January 4th 2013, 08:56 AM
PStudent175
Curvature of implicit equation
Hi,
I need to find the curvature k of y=sqrt(R^2 - x^2)
I know k = |f''| / (1 + f' ^2) ^1.5
But I think I have gone somewhere with my differentiation as I didn't end up with k = 1/R which is the an... | 5 | [
0.032958984375,
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0.046875,
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0.044921875,
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-0.045166015625,
... | 34,465 | 34465 | |
Risk attitudes and informal employment in a developing economy
Abstract
We model an urban labour market in a developing economy, incorporating workers’ risk attitudes. Trade-offs between risk aversion and ability determine worker allocation across formal and informal
wage employment, and voluntary and involuntary self... | 4 | [
0.041748046875,
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0.03173828125,
-0.0373535... | 34,466 | 34466 | |
Cauchy's integral formula
April 15th 2010, 01:01 AM #1
Cauchy's integral formula
$\int_{C}\frac{f(z)}{z-z0}dz = 2\pi.i.f(z0)$
Im using cauchy's integral formula, see above to solve the following integral
$\int_{C}\frac{z}{z^{2}-1}dz$ where $C$ is a circle of radius 4 centred at 0.
I have deduced th... | 5 | [
-0.04541015625,
0.0458984375,
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-0.0615234375,
... | 34,467 | 34467 | |
stuck on a calculus problem from online homework(logarithmic differentiation)
June 29th 2010, 07:20 PM #1
Newbie
Joined
Jun 2010
Posts
4
stuck on a calculus problem from online homework(logarithmic differentiation)
I just registered and am excited to join the community. My problem is: . I feel like I am... | 5 | [
0.01092529296875,
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-0.0703125... | 34,468 | 34468 | |
Homework Help
Posted by sara on Sunday, February 19, 2012 at 9:31pm.
find lim x->0 3- sqrt x+9/-x
• calculus - MathMate, Sunday, February 19, 2012 at 10:26pm
In general, when there is a sum or difference of square-root terms, multiplying both numerator and denominator by the conjugate is a good strategy.
... | 5 | [
-0.0625,
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0.0... | 34,469 | 34469 | |
anhilators of vector spaces.
October 13th 2011, 03:58 PM
Jame
anhilators of vector spaces.
I am trying to prove that
$Ann(W_1+W_2)= Ann(W_1) \cap Ann (W_2)$
I have managed to prove one inclusion
$Ann(W_1) \cap Ann (W_2) \subset Ann(W_1+W_2)$
The fact that any function in these spaces is a lin... | 5 | [
-0.00799560546875,
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0.0634765625,
-0.1015625,
0.0138549804687... | 34,470 | 34470 | |
Homework Help
Posted by Chris on Tuesday, May 14, 2013 at 1:27am.
A major leaugue baseball player hits a ball 3 feet above the ground with a velocity of 103 feet per secon in the direction of a 10 foot wall that is 300 feet from home plate. If the hit is at an
angle of elevation of 34 degrees and there is wind blowing... | 4 | [
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0.0432128... | 34,471 | 34471 | |
Geometric probability.
December 20th 2010, 09:16 AM #11
Super Member
December 20th 2010, 06:36 AM #10
Super Member
December 20th 2010, 12:18 AM #9
December 19th 2010, 04:40 PM #8
Newbie
December 19th 2010, 03:49 PM #7
MHF Contributor
December 19th 2010, 03:47 PM #6
MHF Contributor
December 19th 2010, 03:45 PM... | 5 | [
0.02294921875,
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Homework Help
Posted by stephanie on Thursday, May 3, 2012 at 10:12pm.
√x^5/√x^2 change to exponential notation, then simplify. assume it is positive.
• math - Bosnian, Friday, May 4, 2012 at 1:49am
sqrt ( x ^ 5 ) = ( x ^ 5 ) ^ ( 1 / 2 ) = x ^ ( 5 / 2 )
sqrt ( x ^ 2 ) = x = x ^ 1 = x ^ ( 2 / 2 )
1 / ... | 4 | [
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0.031982421875,
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0.0096435546875,
0.1455078125,
-0.0693359375,... | 34,473 | 34473 | |
Homework Help
Posted by john on Monday, October 24, 2011 at 7:33pm.
a splenical ballon is being inflated @ 10 cubic inches per secound. how fast is the radius of the ballon increasing when the surface area of the ballon is 2 pi square inches( answer to 4 decimal
places)?
• calculus - Steve, Monday, October 24, 2011... | 5 | [
-0.02197265625,
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0.107421875,
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0.0162353515625,
0.000507354736328125... | 34,474 | 34474 | |
Homework Help
Posted by Anonymous on Sunday, May 4, 2008 at 2:12pm.
Within an orthonormal system consider points A(1,4) B(5,1) C(4,8)
(a)Calculate the angle ABC
(b)Show that 3x+4y-19=0 is an equation for line L which passes through A and B
(c)Find a vector equation for line L
(d)(i)give an equation for the circle ... | 4 | [
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0.00162... | 34,475 | 34475 | |
Another seemingly simple integral
February 25th 2009, 01:02 PM #1
Member
Joined
Oct 2008
Posts
242
Another seemingly simple integral
The definite integral from -1/2 to 1/2 of 9/the square root of 1-x^2 dx
I don't even know where to begin in this one. Finding the antiderivative of that seems impossib... | 4 | [
0.0235595703125,
-0.091796875,
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0.0286865234375,
-0.078125,
-0.... | 34,476 | 34476 | |
spectral radius question
April 7th 2010, 07:50 AM #1
Newbie
Joined
Apr 2010
Posts
3
spectral radius question
hi, i'm having trouble seeing where to even begin...
how can i show (||A||_2)^2 = p(A^T * A) for every matrix A in R^(nxn) where p is spectral radius? (A^T is transpose)
any help much app... | 5 | [
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0.04443359375,
-0... | 34,477 | 34477 | |
Annoying algebra
May 19th 2013, 04:57 PM #1
Annoying algebra
It's late and I really am at an end on this, I just can't seem to get it.
Note: A+B = C+D
So, I need to find B in terms of A.
A+B / A-B = k1/k2 * C+D / C-D
cross multiply
(A+B)k2 / (A-B)k1 = C+D / C-D
but A+B = C+D
so
... | 4 | [
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... | 34,478 | 34478 | |
Expanding Binomials
July 19th 2007, 11:26 AM
BlueStar
Expanding Binomials
Find the expansion of (r + 4)</I>3
I have the hardest time ever with this topic. I need a good, clear explanation on how to expand these (for someone who's an apparent math moron).
July 19th 2007, 11:35 AM
red_dog
Do you mean ... | 4 | [
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0.095703125,
-0.00775146484... | 34,479 | 34479 | |
Proposition 63
The square on the major straight line applied to a rational straight line produces as breadth the fourth binomial.
Let AB be a major straight line divided at C, so that AC is greater than CB, let DE be a rational straight line, and to DE let there be applied the parallelogram DF equal to the square on ... | 5 | [
0.0286865234375,
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What is the inverse Laplace transormation of this please?
December 5th 2011, 12:53 PM #1
Newbie
Joined
Aug 2011
Posts
14
What is the inverse Laplace transormation of this please?
Hi I'm trying to work out the inverse Laplace transform of 4/[(s-2)^2 + 16]
Could anyone help please? I have tried factor... | 5 | [
-0.06201171875,
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0.05859375,
0.007568359375,
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0.0498046875,
0.0402832... | 34,481 | 34481 | |
Prime Numbers
January 5th 2007, 05:14 PM #1
Newbie
Joined
Jan 2007
Posts
2
Prime Numbers
Please help me i dont understand how to find out if numbers are prime how do i have to do to find out
Say for example you have the number 139. If it is not prime it's divisible by some number less than $\sqrt{13... | 4 | [
0.0576171875,
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0.00311279296875,
-0.0... | 34,482 | 34482 | |
Orthogonal basic && basic for the orthogonal complement
December 4th 2009, 06:50 AM #1
Newbie
Joined
Dec 2009
Posts
1
Orthogonal basic && basic for the orthogonal complement
Hi guys,
I am stuck with this questions, and final is coming... I would be appreciate if anyone can help me to solve these ques... | 5 | [
-0.06396484375,
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0.076171875,
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-0.02856... | 34,483 | 34483 | |
probability to get a pair (dices)
1. April 30th 2011, 10:58 AM #1
probability to get a pair (dices)
You have five dices. What is the probability that you will get a pair on one roll?
2. April 30th 2011, 02:01 PM #2
Let me get this straight, you have 5 die. If you roll them all at once, what... | 4 | [
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0.0244140625,
-0.1337890625,
... | 34,484 | 34484 | |
use product rule to differentiate function
y= 7x^2 cos3x (with respect to x) i got as far as -sin3x and 14x but got stuck here!
Where $f$ is the $7x^2$ part and $g$ is the $cos 3x$ part
i am using the other form of that if y = u * v so dy/dx = u (dv/dx) + v (du/dx) and taking it from there. after finding the derivati... | 4 | [
-0.0478515625,
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-0.006500244140625,
0... | 34,485 | 34485 | |
range and domain of a function
April 17th 2010, 05:19 AM #1
Junior Member
Joined
Jan 2010
Posts
49
range and domain of a function
let f(x) = x^3 +x^2 -3x-3 and g(x) =1/(x+1)
(i) factorize f(x) completely and find the roots of f(x) = 0
(ii) find gf and its domain
(iii) let h(x) = x^2 -3. is... | 4 | [
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0.0201416015625,
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-0.0454101... | 34,486 | 34486 | |
Coordination in a Single-Retailer Two-Supplier Supply Chain under Random Demand and Random Supply with Disruption
Discrete Dynamics in Nature and Society
Volume 2013 (2013), Article ID 484062, 12 pages
http://dx.doi.org/10.1155/2013/484062
Research Article
Coordination in a Single-Retailer Two-Supplier Supply Chain u... | 5 | [
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... | 34,487 | 34487 | |
Surface Evolver Workshop
Trinity College Surface Evolver Workshop
Home Help Day 2 Day 4
Surface Evolver Workshop Day 3 - Convergence and Hessian
Introduction
Whenever one uses an iterative method, such as the Evolver's 'g' command, there is the... | 4 | [
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0.0303955078125,
0.005... | 34,488 | 34488 | |
Coordinate systems help!
March 14th 2008, 09:57 PM #1
Question is:
The variable chord $PQ$ on the parabola with equation $y^2=4x$ subtends a right angle at the origin $O$. By taking $P$ as $(t_1^2,2t_1)$ and $Q$ as $(t_2^2,2t_2)$, find a relation between $t_1$
and $t_2$ and hence show that $PQ$ passes thr... | 4 | [
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-0.07373046875,
0.1279296875,
-0.0241699218... | 34,489 | 34489 | |
probability of colours of balls
May 24th 2009, 06:36 PM #1
Newbie
Joined
Apr 2009
Posts
11
the question is :
(b) Box 1 contains six red balls and four green balls and box 2 contains seven red balls and three green balls. A ball is chosen at random from box 1 and placed in box 2. A ball is then chosen... | 4 | [
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-0.02001953125... | 34,490 | 34490 | |
inside-R
glmnet {glmnet}
fit a GLM with lasso or elasticnet regularization
Description
Fit a generalized linear model via penalized maximum likelihood. The regularization path is computed for the lasso or elasticnet penalty at a grid of values for the regularization parameter lambda.
Can deal with all shapes of dat... | 4 | [
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-0.0742187... | 34,491 | 34491 | |
[SOLVED] matrix determinant
February 10th 2009, 08:55 AM #1
[SOLVED] matrix determinant
if we have the following matrix
2 1 0 0
3 2 0 0
1 1 3 4
2 -1 2 3 and we want to calculate the determinant .shouldn't in any correct way of calculation obtain the same value of determinant?
if we change the ... | 4 | [
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-0.03... | 34,492 | 34492 | |
di
Oregonator
From Scholarpedia
Richard J. Field (2007), Scholarpedia, 2(5):1386. doi:10.4249/scholarpedia.1386 revision #91613 [link to/cite this article]
The Oregonator (Orygunator) is the simplest realistic model of the chemical dynamics of the oscillatory (Zhabotinsky, 1991; Gray and Scott, 1991; Epstein and Po... | 4 | [
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Help with solving inequalities
June 8th 2007, 04:36 PM #23
Junior Member
June 8th 2007, 04:34 PM #22
June 8th 2007, 04:14 PM #21
Junior Member
June 8th 2007, 03:41 PM #20
Junior Member
June 8th 2007, 03:38 PM #19
June 8th 2007, 03:20 PM #18
Junior Member
June 8th 2007, 03:08 PM #17
June 8th 2007, 02:40 PM #16
... | 4 | [
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\varepsilon P^{H}\right\} $ and $\mathcal{S}=\left\{ j:p_{j}\leq \varepsilon P^{H}\right\} $. Let us say that $\mathcal{L}$ is the set of \emph{large} items, while $\mathcal{S}$ the set of \emph
{small} items. Observe that the number of large items in any feasible solutions is not greater than $\lambda =\min \left\{ k,... | 4 | [
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0.1396484375,
-0.01708984375,... | 34,495 | 34495 | |
solving equation
March 21st 2012, 07:50 AM #1
Junior Member
Joined
Mar 2012
From
malaysia
Posts
73
Thanks
11
solving equation
am i using a valid alternative solution?
question:
$\sin x+\cos\frac{x}{2}=0$
correct solution:
$\sin(2\cdot\frac{x}{2})+cos\frac{x}{2}=0$
$\2sin\... | 4 | [
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The Math and ActionScript of Curves: Gradients and Normals - Tuts+ Code Tutorial
The Math and ActionScript of Curves: Gradients and Normals
We've tackled drawing curves, and finding their quadratic and cubic roots, as well as handy applications for using quadratic roots within games. Now, as promised, we'll look at ap... | 4 | [
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Modeling of Photoconductivity of Porous Silicon
Advances in OptoElectronics
Volume 2011 (2011), Article ID 896962, 4 pages
http://dx.doi.org/10.1155/2011/896962
Research Article
Modeling of Photoconductivity of Porous Silicon
Ivan Franko National University of L'viv, 50 Dragomanov Street, 79005 Lviv, Ukraine
Receiv... | 4 | [
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Brief Introduction to Social Network Modeling
Here is a brief, and not comprehensive, introduction to social network modeling drawing from academic literature in mathematics, statistics, computer science, sociology and physics. This will simply
introduce some basic models. I won’t get into stochastic (random) processe... | 4 | [
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