content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
Closed forms of summations and reprospective relations
January 14th 2012, 10:40 PM #1
Newbie
Joined
Jan 2012
Posts
4
Hello and have a nice week !
Im asking your help with the following exercices (tried but failed).
So the first one
Find the closed form of the double summation
S(from j=1 t... | 5 | [
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-0.0625,
0.0908203125,
0.0257568359375,
0.0191650390625,
-0.08447265625,
-0.009033203125,
0.0225830078125,
-0.03857421875,
0.0233154296875,
-0.08642578125,
0.0094604492187... | 26,200 | 26200 | |
Study of Syngas Conversion to Light Olefins by Response Surface Methodology
Journal of Chemistry
Volume 2013 (2013), Article ID 945735, 12 pages
http://dx.doi.org/10.1155/2013/945735
Research Article
Study of Syngas Conversion to Light Olefins by Response Surface Methodology
^1Department of Chemical Engineering, Fa... | 4 | [
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0.038818359375,
0.05493164062... | 26,201 | 26201 | |
Permanence, Extinction, and Almost Periodic Solution of a Nicholson's Blowflies Model with Feedback Control and Time Delay
Discrete Dynamics in Nature and Society
Volume 2013 (2013), Article ID 798961, 9 pages
http://dx.doi.org/10.1155/2013/798961
Research Article
Permanence, Extinction, and Almost Periodic Solutio... | 5 | [
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0.0322265625,
-0.038330... | 26,202 | 26202 | |
prove inverse transformation is linear
October 12th 2010, 04:24 PM #1
Newbie
Joined
Oct 2009
Posts
21
prove inverse transformation is linear
Could someone help me with the following problem?
Suppose A is a linear transformation from the x-y plane to itself. Show that A^-1 is also a linear transforma... | 5 | [
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0.00662231445312... | 26,203 | 26203 | |
Controller Design Considerations for ACM APFC Systems
Advances in Power Electronics
Volume 2012 (2012), Article ID 286861, 9 pages
http://dx.doi.org/10.1155/2012/286861
Research Article
Controller Design Considerations for ACM APFC Systems
Department of Electrical Engineering and Computer Science, University of Cali... | 4 | [
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0.0332031... | 26,204 | 26204 | |
polynomial decomposition
September 24th 2013, 11:57 PM
niaren
polynomial decomposition
I'm not able to show that this expression:
$H_1 = \frac{a^3(1+x^{-1})^3}{(1+a+(a-1)x^{-1})(1+a+a^2+(2a^2-2)x^{-1}+(1-a+a^2)x^{-2})}$
can be written
$H_2 = \frac{1}{2} \left( \frac{a-1+(1+a)x^{-1}}{1+a+(a-1)x^{-1... | 4 | [
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0.032470703125,
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nvestigat
by Bernard Béland
Béland, Bernard. Short Circuit Current for the Fire Investigator.
... | 5 | [
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0.00885009765625,
... | 26,206 | 26206 | |
A Modeling Study of the Initial Formation of Polar Lows in the Vicinity of the Arctic Front
Advances in Meteorology
Volume 2014 (2014), Article ID 970547, 10 pages
http://dx.doi.org/10.1155/2014/970547
Research Article
A Modeling Study of the Initial Formation of Polar Lows in the Vicinity of the Arctic Front
Polar ... | 4 | [
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Global Grids, Part 2: Indexing the grid
As I alluded to in my previous post, identifying the grid system I wanted to use was just part of the solution. In order to work effectively at this scale, I needed to have a way to concisely
identify each cell, a method to quickly calculate the neighbors of a given cell, and a m... | 4 | [
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-0.01940... | 26,208 | 26208 | |
Comparison of Different Analytic Solutions to Axisymmetric Squeezing Fluid Flow between Two Infinite Parallel Plates with Slip Boundary Conditions
Abstract and Applied Analysis
Volume 2012 (2012), Article ID 835268, 18 pages
http://dx.doi.org/10.1155/2012/835268
Research Article
Comparison of Different Analytic Solut... | 5 | [
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Brightness scale in decibels.
July 25th 2011, 09:06 AM #1
Newbie
Joined
May 2011
Posts
12
Brightness scale in decibels.
I wonder if you can help me with this:
I've got these values that I need to convert to db values.
For example, I've got a value of 49.5 ... How will i fit into a scale of numb... | 5 | [
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Certain Spaces of Functions over the Field of Non-Newtonian Complex Numbers
Abstract and Applied Analysis
Volume 2014 (2014), Article ID 236124, 12 pages
http://dx.doi.org/10.1155/2014/236124
Research Article
Certain Spaces of Functions over the Field of Non-Newtonian Complex Numbers
^1Department of Mathematical Eng... | 4 | [
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the encyclopedic entry of summation
For evaluation of sums in closed form see evaluating sums.
Summation is also a term used to describe a process in synapse biology.
Summation is the addition of a set of numbers; the result is their sum or total. The "numbers" to be summed may be natural numbers, complex num... | 4 | [
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Comments on The Geomblog: An intuitive argument for the JL lemma ?(Note you can also prove things like the Chernoff ...The basic idea is to write |Sx|_2^2 = |x|_2^2 + Z,...is it something you can summarize here ?At least for the Achlioptas construction with rand...
tag:blogger.com,1999:blog-6555947.post7696856316448295... | 4 | [
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Use of freqparcoord for Regression Diagnostics
April 14, 2014
By matloff
This is the third in my series of three posts on my package freqparcoord with Yingkang Xie. (My next post after this will show how to use R to explore one of my favorite examples of “what can go
wrong” in statistics.)
Here is a very brief revi... | 5 | [
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Linear Algebra: Linear Transformations(1)
December 24th 2008, 10:25 PM #1
Linear Algebra: Linear Transformations(1)
Hello,
I am teaching myself Linear Algebra following P.R.Halmos' "Finite Dimensional Vector Spaces".
I am stuck at a couple of problems:
-----------------------------------------------... | 5 | [
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Circle Angle, Time: xy coordinates
March 25th 2012, 12:34 PM #1
Member
Joined
Oct 2011
Posts
153
Circle Angle, Time: xy coordinates
A ferris wheel is rotating at the constant angular speed of 3 RPM counterclockwise. The platform of this ferris wheel is a circular disc of radius 24 feet. You jump onto the... | 4 | [
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Variance, and Standard Deviation
November 11th 2009, 06:53 PM #1
Newbie
Joined
Feb 2009
Posts
5
Variance, and Standard Deviation
I have the following problem I'm working on and although I understand the formula's for mean, variance, and standard deviation I don't know which numbers need to be plugged int... | 4 | [
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0.0145874023437... | 26,217 | 26217 | |
Compact, bounded, closed-range operators on Hilbert spaces have finite rank
May 26th 2012, 12:54 AM #1
Newbie
Joined
May 2012
From
Australia
Posts
1
Compact, bounded, closed-range operators on Hilbert spaces have finite rank
Hi,
I am trying to prove that if $T:H\to{H}$ is a compact, bounded oper... | 4 | [
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Another Inner Product Question.
May 2nd 2008, 07:01 PM #1
Another Inner Product Question.
Let A be a real invertible $n$ x $n$ matrix. Show that
<x,y> ≡ $y^T$$A^T$$Ax$ = $(Ay)^T$$(Ax)$
defines an inner product in ℝ^n, where x and y are column vectors in ℝ^n. What happens when A is not invertible? (Note ... | 5 | [
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check work2
July 20th 2009, 09:10 AM
william
check work2
1. if $3^{2x-3}=27$
x=2
2. if $2^{x-1}= \frac{1}{16}$
x=5
3. if $2^{x+2}-2^x=12<br />$
x=-2
4. if $300(1.05)^n=600$
n=2.78
5. to solve $3^{x+2}-3^x=216$ you must use the logarithmic method
July 20th 2009, 10:43 AM
... | 4 | [
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... | 26,220 | 26220 | |
Page 2
[Go to previous section: 1.4| Go to next section: 1.6]
[ Go to CENG301 Homepage | CENG301 Notes Table of Contents]
1.5 Analysis of Plant Units - Page 2
Page 2
1.5.4 The Root Finding "Module": ssec2
The root finding functions ssec1 and ssec2 were developed for a course in computer applications to illustra... | 5 | [
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sample mean question
March 31st 2011, 05:05 AM #1
Newbie
Joined
Jun 2008
Posts
9
sample mean question
Y_1,Y_2, . . . ,Y_n are independent and identically distributed Exp(Q)
random variables.
Which are the distribution of the sample mean?
Sample mean=X=(1/n)*SIGMA(Y_k)
1. X~Exp(Q)
2.... | 4 | [
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Impurities probability problem
January 16th 2010, 02:10 PM #1
Newbie
Joined
Jan 2010
Posts
1
Impurities probability problem
Hi guys! I'm new in theory of probability and I'm having a hard time solving a probability problem. I'll be really grateful if you explain to me the solution.
So here's the prob... | 4 | [
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solving for basis of a given eigenspace
September 24th 2012, 10:45 AM #1
Junior Member
Joined
Sep 2012
From
ohio
Posts
68
solving for basis of a given eigenspace
I'm confused on how to approach this problem. Given matrix A and the Identity I where A+I is row equivalent to
[1,-2,3,5][0,0,1,4][0,0,... | 5 | [
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Homework - Probability Density Function
March 8th 2009, 04:36 AM #1
Newbie
Joined
Mar 2009
Posts
7
At my local sandwich bar, I have noticed that it always takes at least two minutes to serve a customer and it can take much longer to fulfil an unusual order. The time in minutes taken to serve a
custome... | 5 | [
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Maximum stress and bending moments
September 5th 2013, 10:38 AM #1
Junior Member
Joined
Sep 2013
From
texas
Posts
73
Maximum stress and bending moments
A beam of rectangular cross section 200 mm deep and 100 mm wide. If
the beam is 3m long, simply supported at either end and carries point
loa... | 5 | [
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Homework Help
Posted by Watermelon on Thursday, November 24, 2011 at 7:04am.
Given an arithmetic progression -7,-3,1,..., state three consecutive terms in this progression which sum up to 75.
• AP calculus - Damon, Thursday, November 24, 2011 at 7:36am
+ 4 = change from term to term
x-4 + x + x+4 = 75
... | 4 | [
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0.01806640625,
-0.031005859375,
-0.0539550781... | 26,227 | 26227 | |
Number of functions from one set to another
January 24th 2013, 12:59 PM #1
Junior Member
Joined
Oct 2012
From
Wisconsin
Posts
29
Thanks
1
Number of functions from one set to another
How many functions are there from the set {1, 2, . . . , n}, where n is a positive integer, to the set {0, 1}
a... | 4 | [
0.01226806640625,
-0.000514984130859375,
0.0283203125,
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0.0296630859375,
0.115234375,
0.039794921875,
0.000568389892578125,
-0.02880859375,
-0.095703125,
-0.09912109375,
0.050048828125,
-0.021728515625,
-0.044189453125,
0.00469970703125,
-0.013671875,
... | 26,228 | 26228 | |
Find the equation of the tangent line to the curve.
June 12th 2009, 08:21 AM #1
Find the equation of the tangent line to the curve.
Hi guys,
Could someone take a look at my work.. im lost.
Problem:
Code:
Find the equation of the tangent line to the curve
y= 4 tan x at the point ( pi/4 , 4... | 4 | [
-0.03759765625,
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0.059326171875,
0.01336669921875,
0.031494140625,
0.15625,
-0.05517578125,
-0.01208496... | 26,229 | 26229 | |
Linearity / Matrix functions?
February 3rd 2009, 06:06 PM #1
Member
Joined
Mar 2008
Posts
182
Linearity / Matrix functions?
I shouldn't have left it so late to ask this, but the answers to any of these would be most helpful...
Is the function mapping a matrix A to the determinant of A linear?
I'... | 4 | [
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0.05... | 26,230 | 26230 | |
Complex Integration
May 5th 2010, 12:18 PM
zizou1089
Complex Integration
How would I compute:
$I=\int_{2\pi }^{0}\frac{4d\theta }{2 cos\theta + 3 sin\theta + 2i}$
I have tried finding the poles by changing the values into complex values
where $z=e^{i\theta }$
$2cos\theta =z+\frac{1}{z}$
... | 4 | [
-0.048095703125,
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0.0306396484375,... | 26,231 | 26231 | |
A Probe-Compensated Helicoidal NF-FF Transformation for Aperture Antennas Using a Prolate Spheroidal Expansion
International Journal of Antennas and Propagation
Volume 2012 (2012), Article ID 753156, 13 pages
http://dx.doi.org/10.1155/2012/753156
Research Article
A Probe-Compensated Helicoidal NF-FF Transformation fo... | 4 | [
-0.0341796875,
0.0091552734375,
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-... | 26,232 | 26232 | |
High Efficient Numerical Methods for Viscous and Nonviscous Wave Problems
Journal of Applied Mathematics
Volume 2013 (2013), Article ID 267106, 11 pages
http://dx.doi.org/10.1155/2013/267106
Research Article
High Efficient Numerical Methods for Viscous and Nonviscous Wave Problems
^1Center for Combinatorics, Nankai ... | 5 | [
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... | 26,233 | 26233 | |
Nonlocal Problems for Fractional Differential Equations via Resolvent Operators
International Journal of Differential Equations
Volume 2013 (2013), Article ID 490673, 9 pages
http://dx.doi.org/10.1155/2013/490673
Research Article
Nonlocal Problems for Fractional Differential Equations via Resolvent Operators
^1Depar... | 5 | [
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0.00000... | 26,234 | 26234 | |
Become a Better Writer
Anytime, Anywhere.
Write Now!
www.SpiderSmart.com
Real Teachers, Real results
703-943-6969
eLearning@spidersmart.com
Hello again!
For most of us, it is summer, and school is out... (though for some of you it is winter!). Yet, I have foun... | 4 | [
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0.0888671875,
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-0.00543212890625,
0... | 26,235 | 26235 | |
Urgent! Calc 1 Optimization
March 20th 2007, 08:32 PM
Ideasman
Urgent! Calc 1 Optimization
Suppose that a manufacterer is wanting to produce cans that'll hold 216 cubic inches that are in the form of a right circular cylinder. Determine the dimensions (radius of an end and height) of
the can that'll use the ... | 5 | [
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0... | 26,236 | 26236 | |
Chaotic
Chaotic 1D maps
Surprisingly very simple 1D maps yield good model of chaotic systems.
Sawtooth map and Bernoulli shifts
The sawtooth map is determined as
x[n+1] = 2x[n] (mod 1)
where x (mod 1) is the fractional part of x. In the binary number system multiplying by 2 corresponds to the left shift by one b... | 4 | [
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-0.0179443359375,
... | 26,237 | 26237 | |
how to integrate sin(x/y) dx
April 23rd 2010, 07:26 PM #1
Newbie
Joined
Apr 2009
Posts
11
how to integrate sin(x/y) dx
can anyone assist with evaluating the integral if sin (x/y) with respect to x & y, i have tried using integration by parts but cant seem to get an answer.
i know by using the online... | 5 | [
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and Robust Fuzzy Learning Control of an Overhead Crane
Mathematical Problems in Engineering
Volume 2013 (2013), Article ID 712615, 12 pages
http://dx.doi.org/10.1155/2013/712615
Research Article
Switched Two-Level and Robust Fuzzy Learning Control of an Overhead Crane
^1Department of Mechanical Engineering, Chang G... | 4 | [
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0.027587890625,
-0.06298... | 26,239 | 26239 | |
cylinder volume and surface area relation
September 19th 2011, 11:44 PM
boingz
cylinder volume and surface area relation
soo the question is: there is a volume of 750cm^3 of molten metal available, find the minimum dimensions to create a cylinder.
it sounds quite vague from looking at it. ive tried using bo... | 4 | [
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0.0218505859375,... | 26,240 | 26240 | |
R Tutorial Series: Basic Polynomial Regression
February 8, 2010
By John Quick
Often times, a scatterplot reveals a pattern that seems not so linear. Polynomial regression can be used to explore a predictor at different levels of curvilinearity. This tutorial will demonstrate
how polynomial regression can be used in ... | 4 | [
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-... | 26,241 | 26241 | |
I Find With My Little Mind
August 14th 2008, 09:25 AM #1
Member
Joined
Sep 2007
Posts
75
I Find With My Little Mind
I'm thinking of a number between 1-100...
1/5 and 1/3 of the number are both integers.
there are 9 other integers in between 1/5 and 1/3 (excluding them).
(Easy question for m... | 4 | [
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-0.0327... | 26,242 | 26242 | |
the encyclopedic entry of S-Matrix
Scattering matrix redirects here. For the meaning in linear electrical networks, see scattering parameters.
In physics, the scattering matrix (S-matrix) relates the initial state and the final state for an interaction of particles. It is used in quantum mechanics, scattering theo... | 4 | [
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-0.0... | 26,243 | 26243 | |
The Analytical Solution of Some Fractional Ordinary Differential Equations by the Sumudu Transform Method
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 203875, 6 pages
http://dx.doi.org/10.1155/2013/203875
Research Article
The Analytical Solution of Some Fractional Ordinary Differential Equations by th... | 5 | [
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0.06640625,
-0.0432128... | 26,244 | 26244 | |
Separable Equation Help
January 14th 2010, 11:56 AM #1
Newbie
Joined
Jan 2010
Posts
3
Separable Equation Help
I was assigned a problem that stated pressure, p, and density, ρ, are related by the equation dp = -gρ dy. It said it follow the adiabatic equation p=p0(ρ/ρ0)^γ, where γ is not equal to 0, and p0... | 5 | [
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-0.... | 26,245 | 26245 | |
Fixed Points of Asymptotic Pointwise Nonexpansive Mappings in Modular Spaces
Journal of Applied Mathematics
Volume 2012 (2012), Article ID 319394, 6 pages
http://dx.doi.org/10.1155/2012/319394
Research Article
Fixed Points of Asymptotic Pointwise Nonexpansive Mappings in Modular Spaces
^1Department of Mathematics, T... | 5 | [
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-0.... | 26,246 | 26246 | |
Probability and dice
November 7th 2011, 04:01 PM #1
Junior Member
Joined
Oct 2011
Posts
47
Probability and dice
Refer to dice that are loaded so that the numbers 2, 4, and 6 are equally likely to appear. 1, 3, and 5 are also equally likely to appear, but 1 is three times as likely as 2 is to appear.
... | 4 | [
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... | 26,247 | 26247 | |
Math Help
December 18th 2008, 12:30 PM #1
Newbie
Joined
Dec 2008
Posts
3
matrix
ok, so i know this math problem should be easy, but i really dont understand it. pls help me out!
the following are supposed to be matrices but i do not know how to make them on the computer.
Let X= (1 1
1 1)
... | 5 | [
0.00982666015625,
0.06103515625,
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0.019775390625,
-0.022216796875,
0.1572265625,
-0.04296875,
0.011718... | 26,248 | 26248 | |
Reduced-Order Antisynchronization of Chaotic Systems via Adaptive Sliding Mode Control
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 415652, 12 pages
http://dx.doi.org/10.1155/2013/415652
Research Article
Reduced-Order Antisynchronization of Chaotic Systems via Adaptive Sliding Mode Control
^1School o... | 5 | [
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0.0986328125,
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0.0791015625,
-0.06201171875,
-... | 26,249 | 26249 | |
The Impact of the Rotor Slot Number on the Behaviour of the Induction Motor
Advances in Power Electronics
Volume 2013 (2013), Article ID 837010, 9 pages
http://dx.doi.org/10.1155/2013/837010
Research Article
The Impact of the Rotor Slot Number on the Behaviour of the Induction Motor
Deptment of Electrical and Comput... | 4 | [
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Positive Periodic Solutions of Cooperative Systems with Delays and Feedback Controls
International Journal of Differential Equations
Volume 2013 (2013), Article ID 502963, 9 pages
http://dx.doi.org/10.1155/2013/502963
Research Article
Positive Periodic Solutions of Cooperative Systems with Delays and Feedback Control... | 5 | [
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0.01031494140625,
0.005035400390... | 26,251 | 26251 | |
Intergration by Substition Formula compared to Symbolic Algebra Software Answer
July 20th 2012, 03:42 PM #1
Newbie
Joined
Jul 2012
From
Australia
Posts
6
Intergration by Substition Formula compared to Symbolic Algebra Software Answer
For $\int{\sqrt(9-25x^2)} dx$
I got the answer by substitution... | 5 | [
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0.0223388671875,
... | 26,252 | 26252 | |
The quadratic function
November 30th 2008, 03:04 AM #1
Newbie
Joined
Nov 2008
Posts
21
Well, we know that a quadratic function is a MIN when the coefficient of x^2 is positive and a MAX when the coefficient of x^2 is negative. Is there a particular proof or derivation for this?
What is the reasoning b... | 4 | [
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-0.0166015625,
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0.10400390625,
-0.01239013671... | 26,253 | 26253 | |
Existence of Periodic Solutions to Nonlinear Differential Equations of Third Order with Multiple Deviating Arguments
International Journal of Differential Equations
Volume 2012 (2012), Article ID 406835, 13 pages
http://dx.doi.org/10.1155/2012/406835
Research Article
Existence of Periodic Solutions to Nonlinear Diffe... | 5 | [
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Computing channel capacities for non-symmetric channels
up vote 3 down vote favorite
2
I'm studying information theory right now and I'm reading about channel capacities.
I know that there are known expressions for computing the capacities for some well known simple channels such as BSC, the Z channel.
Could you sho... | 5 | [
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GMAT Prep few more
Author Message
TAGS:
GMAT Prep few more [#permalink] 22 Feb 2010, 15:09
00:00
B
C
... | 4 | [
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find gradient, equation, value, graph included.
October 25th 2007, 04:02 AM #1
Junior Member
Joined
Oct 2007
Posts
32
find gradient, equation, value, graph included.
This seems simple but it doesnt really sink in for me.
Can i have working out plz. thanx for any help
Solution
I'm not sure ab... | 4 | [
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theory
You are currently browsing the tag archive for the ‘SAT’ tag.
As reported here, here and here, Mark Braverman has just announced a proof of a 1990 conjecture by Linial and Nisan.
Mark proves that if ${C}$ is an AC0 boolean circuit (with NOT gates and with AND gates and OR gates of unbounded fan-in) of depth ${... | 4 | [
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Questions in need of checking.
December 20th 2007, 07:33 AM
greenhighlighter
Questions in need of checking.
I was given a few problems to do for my pre-calc class, and I solved pretty much everything on my own. All I need is for someone to check the answers to make sure they're correct. Anyone willing?
1. f... | 4 | [
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0.0233154296875,
-0.01611328125,
-0... | 26,259 | 26259 | |
Robust Maximum Lifetime Routing and Energy Allocation in Wireless Sensor Networks
International Journal of Distributed Sensor Networks
Volume 2012 (2012), Article ID 523787, 14 pages
http://dx.doi.org/10.1155/2012/523787
Research Article
Robust Maximum Lifetime Routing and Energy Allocation in Wireless Sensor Network... | 4 | [
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0.048828125,
-0.0654296875... | 26,260 | 26260 | |
Regularity and Exponential Growth of Pullback Attractors for Semilinear Parabolic Equations Involving the Grushin Operator
Abstract and Applied Analysis
VolumeΒ 2012Β (2012), Article IDΒ 272145, 20 pages
http://dx.doi.org/10.1155/2012/272145
Research Article
Regularity and Exponential Growth of Pullback Attractors fo... | 4 | [
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-0.154... | 26,261 | 26261 | |
Limacon, Inner Loop Area
Find the area inside the loop of the following limacon: r = 7 − 14 sin (θ). Please help!
did you draw the graph? now that we have drawn it, we see that the inner loop happens when the graph goes to the origin, that is, when $r = 0$. so let's solve for that: $\Rightarrow 0 = 7 - 14 \sin \
theta... | 5 | [
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0.010803222... | 26,262 | 26262 | |
$\mathbb{P}^n$ is simply connected
up vote 14 down vote favorite
8
In his chapter about Hurwitz' theorem for curves, Hartshorne shows that $\mathbb{P}^1$ is simply connected, i.e. every finite étale morphism $X \to \mathbb{P}^1$ is a finite disjoint union of $\
mathbb{P}^1$s. In an exercise the reader is invited to sh... | 4 | [
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0.029541015625,
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Fatigue Reliability Assessment of Steel Member Using Probabilistic Stress-Life Method
Advances in Mechanical Engineering
Volume 2012 (2012), Article ID 649215, 10 pages
http://dx.doi.org/10.1155/2012/649215
Research Article
Fatigue Reliability Assessment of Steel Member Using Probabilistic Stress-Life Method
^1Machi... | 4 | [
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-0.0... | 26,264 | 26264 | |
Shadows
December 2nd 2006, 08:07 PM
Tascja
Shadows
A floodlight that is 15 m away and at ground level illuminates a building. A man 2 m tall walks away from the light directly towards the building at 2 m/s. Find the rate of change of the length
of his shadow when he is 4 m from the light.
so far i have ... | 5 | [
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0.08154296875,
0.052001953125,
0.01129150390625,
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Transport Reversal during Heteroexchange: A Kinetic Study
Journal of Biophysics
Volume 2013 (2013), Article ID 683256, 14 pages
http://dx.doi.org/10.1155/2013/683256
Research Article
Transport Reversal during Heteroexchange: A Kinetic Study
^1Department of Physics, UPR, San Juan, PR 00931, USA
^2Department of Bioche... | 4 | [
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0.123... | 26,266 | 26266 | |
doubling time
August 16th 2009, 08:06 AM #1
Senior Member
Joined
Nov 2008
Posts
425
doubling time
The population of the world is doubling every 35 a. In 1987 the total population reached 5 billion. find the projected world population for the year 2001.
USE THE EXPONENTIAL GROWTH FORMULA.
y=y_o(e)... | 4 | [
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Maclaurin series error of approximation!?!
March 30th 2010, 03:50 PM #1
Member
Joined
Jan 2010
Posts
88
Maclaurin series error of approximation!?!
So it says find the Maclaurin series of
$f(x)=e^(2x)$
Then the part I don't get: How many terms of the series are required so that the error of the ap... | 5 | [
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Systems of Equations/Inequalities
April 20th 2008, 11:33 AM #1
Member
Joined
Jul 2007
Posts
75
1.) Solve the following system of equations using Gaussian elimination:
3w+10x-2y+3z=55
w+12x-11y-z= 69
-3w-6x-5y-10z=-47
-3w+9x+5y+4z=-1
Here's what I did so far:
swap R1 and R2 (row 1 ... | 4 | [
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0.07421875,
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-0.00439453125,
... | 26,269 | 26269 | |
Differentation (Business Calculus)
February 2nd 2008, 05:20 PM #1
Member
Joined
Jan 2008
Posts
76
Differentation (Business Calculus)
I can't really figure out what I need to plug in. Here is the problem ...
At 0 degrees Celsius, the heat loss H (in kilocalories per square meter per hour) from a pers... | 4 | [
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0.0262451171875,
0.0091552734375,
-0.01409912109375,
0... | 26,270 | 26270 | |
A Nonlocal Model for Carbon Nanotubes under Axial Loads
Advances in Materials Science and Engineering
Volume 2013 (2013), Article ID 360935, 6 pages
http://dx.doi.org/10.1155/2013/360935
Research Article
A Nonlocal Model for Carbon Nanotubes under Axial Loads
Department of Structures for Engineering and Architecture... | 5 | [
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Stabilized Multiscale Nonconforming Finite Element Method for the Stationary Navier-Stokes Equations
Abstract and Applied Analysis
Volume 2012 (2012), Article ID 651808, 27 pages
http://dx.doi.org/10.1155/2012/651808
Research Article
Stabilized Multiscale Nonconforming Finite Element Method for the Stationary Navier-... | 4 | [
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0.029174804687... | 26,272 | 26272 | |
the encyclopedic entry of Bremsstrahlung
Bremsstrahlung
(
pronounced
, from
German bremsen
"to brake" and
Strahlung
"radiation", i.e. "braking radiation" or "deceleration radiation"), is
electromagnetic radiation
produced by the
deceleration
of a charged particle, such as an
electron
, when deflected by an... | 4 | [
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0.00017929077... | 26,273 | 26273 | |
The volume of water in a certain tank is x percent greater
Author Message
TAGS:
The volume of water in a certain tank is x percent greater [#permalink] 20 Jan 2013, 00:49
... | 4 | [
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Proposition 76
If from a straight line there is subtracted a straight line which is incommensurable in square with the whole and which with the whole makes the sum of the squares on them added together rational,
but the rectangle contained by them medial, then the remainder is irrational; let it be called minor.
From... | 5 | [
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Can you verify my Physics work please?
February 23rd 2013, 09:42 AM #1
Can you verify my Physics work please?
I am preparing for a physics test and i want to make sure what and how I am solving the review questions is correct because I have no answer key!Thank you in advance!
2-You are driving in your car a... | 4 | [
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0.03076171... | 26,276 | 26276 | |
A Mathematical Modelling Approach for Systems Where the Servers Are Almost Always Busy
Computational and Mathematical Methods in Medicine
Volume 2012 (2012), Article ID 290360, 6 pages
http://dx.doi.org/10.1155/2012/290360
Research Article
A Mathematical Modelling Approach for Systems Where the Servers Are Almost Alw... | 4 | [
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... | 26,277 | 26277 | |
tough tough gauss law
April 14th 2008, 11:19 PM #1
Newbie
Joined
Mar 2008
Posts
24
tough tough gauss law
1)The electric field at apoint P(x,y,z) due to a point charge q located at the origin is given by the inverse square field
E=qr/||r||^3
where r=xi+yj+zk
(a)Suppose S is a closed surface,Sa... | 4 | [
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0.0113525390625,
-0.076... | 26,278 | 26278 | |
Vibration-Powered Radiation of Quaking Magnetar
ISRN Astronomy and Astrophysics
Volume 2011 (2011), Article ID 843825, 5 pages
http://dx.doi.org/10.5402/2011/843825
Research Article
Vibration-Powered Radiation of Quaking Magnetar
^1State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking Uni... | 4 | [
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0.06982421875,
-0.0303955078125,
-0... | 26,279 | 26279 | |
APGP Combined
November 1st 2008, 06:47 PM
zeromeyzl
APGP Combined
First 3 terms of a GP are 2nd, 10th and 26th terms of an AP respectively. Show that common ratio of GP is 2.
How the heck do you do that? Thanks for helping! :)
November 1st 2008, 07:18 PM
mr fantastic
Quote:
Start by considering... | 4 | [
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... | 26,280 | 26280 | |
Kinetic Models for Microbial Survival During Processing
World-renowned scientists participated in IFT’s second Research Summit to advance the understanding of microbial inactivation kinetics and models for non-log-linear survivor curves and identify needs
for further research.
The Institute of Food Technologists conve... | 4 | [
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0.01171875,
-0.035888671875... | 26,281 | 26281 | |
Formula for gradient of composite function
April 22nd 2009, 04:45 PM
tttcomrader
Formula for gradient of composite function
Suppose that $f: \mathbb {R}^n \rightarrow \mathbb {R}$ and $g: \mathbb {R} \rightarrow \mathbb {R}$
Find a formula for $abla (g \circ f)(x)$
I have $abla (g \circ f) = ( \frac { ... | 4 | [
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Problem With A Sequence Proof
March 9th 2007, 10:54 AM
spiritualfields
Problem With A Sequence Proof
The theorem for finding the sum of n terms of an Arithmetic Sequence is:
Sn = n/2[ 2a + (n - 1)d ] = n/2(a + an)
However, I am having a problem with the proof of this which is given in the book. I will... | 4 | [
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-0.014587402343... | 26,283 | 26283 | |
The Exponential Dichotomy under Discretization on General Approximation Scheme
Advances in Numerical Analysis
VolumeΒ 2011Β (2011), Article IDΒ 582740, 22 pages
http://dx.doi.org/10.1155/2011/582740
Research Article
The Exponential Dichotomy under Discretization on General Approximation Scheme
^1Department de Mathem... | 4 | [
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Hard Integration help
Can you please solve this problems? $\int\frac{x^4-x {dx}}{x^2-1}$ $\int\frac{e^{4y}}{e^{2y}+1}dy$ $\int\frac{dx}{(2x-1)[3-2 \ln (1-2x)]}$ $\int\frac{dx}{x(1-x^3)}$ $\int\frac{(3-4x)x dx}{\sqrt[3]
{1-x}}$ Thanks in Advance
Last edited by mr fantastic; August 3rd 2009 at 04:25 AM. Reason: Fixed ex... | 4 | [
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On a Strongly F-regular Pair (X, \Delta)
up vote 2 down vote favorite
Let $X$ be a normal projective variety over a field of characteristic $p>0$ and $(X, \Delta\geq 0)$ be a pair such that $K_X+\Delta$ is $\mathbb{Q}$-Cartier whose index is not divisible by $p$. Also
assume that $A$ is an effective Cartier divisor, t... | 5 | [
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togology-set proof
August 29th 2012, 03:13 PM #1
Junior Member
Joined
Jun 2010
Posts
35
togology-set proof
Im new to proofs, and the proof class i took last semester was absolutely terrible. Im given A isa subset of S and B is a subset of S. I need to prove that a is a subset of the complement of B
i... | 5 | [
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pairwise relatively prime
June 10th 2010, 05:45 AM #1
Super Member
Joined
Apr 2009
Posts
677
pairwise relatively prime
This question is based on Goldbach's Proof of the Infinitude of Primes
Goldbach's Proof of the Infinitude of Primes (1730)
Let
a1 = a
a2 = a1+b
a3 = a1a2 + b
a4... | 4 | [
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0... | 26,288 | 26288 | |
Two-Level Credit Financing for Noninstantaneous Deterioration Items in a Supply Chain with Downstream Credit-Linked Demand
Discrete Dynamics in Nature and Society
Volume 2013 (2013), Article ID 917958, 22 pages
http://dx.doi.org/10.1155/2013/917958
Research Article
Two-Level Credit Financing for Noninstantaneous Dete... | 5 | [
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0.015625... | 26,289 | 26289 | |
induction inequalities P3
Prove using the principle of mathematical induction that (1+x)^n> (or equal to) 1+nx, n=1,2,3... thank you !
This is very straightforward. If $(1+x)^n\ \ge\ 1+nx$ ......(1) then $(1+x)^{n+1}\ must\ be\ \ge\ 1+(n+1)x$ ....... (2) Try to prove this using (1) as this means (1) being true for som... | 4 | [
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... | 26,290 | 26290 | |
Computing Legendre Symbol
April 11th 2011, 07:55 PM #1
Senior Member
Joined
Apr 2008
From
Vermont
Posts
318
Computing Legendre Symbol
1.Determine if x^2+5=0 mod 293 is solvable
I have x^2=-5 mod 293
So I look at (-5/293)=(-1/293)(5/293)=1*(5/293)=(293/5)=(3/5)=(5/3)=(2/3)=-1
So not solvab... | 5 | [
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Please check my probability work guys...
March 10th 2008, 07:19 AM #1
Please check my probability work guys...
Hey guys, I'm having some problems with combinations and permutations.
I have included my answers as well, explanations will be highly appreciated.
I'll try to give +rep+ if it is possible.
... | 4 | [
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find the cylindrical , rectangular, spherical coordinates
January 9th 2007, 09:53 AM #1
Member
Joined
Nov 2006
Posts
123
A right circular cylinder of radius 10cm spinning at 3 revolutions per minute about the z-axis. At time t=0s, a bug at the point (0,10,0) begins walking straight up the face of the cyli... | 5 | [
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Bernoulli/Binomial Distributions
October 18th 2008, 09:23 PM #1
Bernoulli/Binomial Distributions
There is this one part of a problem I'm having trouble setting up...
On a six-question multiple-choice test there are five possible answers for each question, of which one is correct (C) and four are incorrect (... | 4 | [
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Using Cellular Automata to Investigate Pedestrian Conflicts with Vehicles in Crosswalk at Signalized Intersection
Discrete Dynamics in Nature and Society
Volume 2012 (2012), Article ID 287502, 16 pages
http://dx.doi.org/10.1155/2012/287502
Research Article
Using Cellular Automata to Investigate Pedestrian Conflicts w... | 4 | [
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0.0356... | 26,295 | 26295 | |
Numerical Solution of Singularly Perturbed Delay Differential Equations with Layer Behavior
Abstract and Applied Analysis
Volume 2014 (2014), Article ID 731057, 4 pages
http://dx.doi.org/10.1155/2014/731057
Research Article
Numerical Solution of Singularly Perturbed Delay Differential Equations with Layer Behavior
^... | 5 | [
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Physics Forums - Efficiently calculating the magnitude of gravitational force
Richard Nash Dec9-12 10:31 PM
Efficiently calculating the magnitude of gravitational force
I am reading Kolenkow and Kleppner's Classical Mechanics and they have tried to calculate the gravitational force between a uniform thin spheric... | 4 | [
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Itegration
Integrate the following equation with resprect to x twice: f'(x) + x f''(x) = 0
Hello, feage7! A slightly different approach . . . Integrate with resprect to $x$ twice: . $f'(x) + x f''(x) \:= \:0$ Note that we have: . $\frac{d}{dx}\left[x\!\cdot\!f'(x)\right] \:=\:0$ Integrate:
. $x\!\cdot\!f'(x)\:=\:C_1$ ... | 5 | [
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Software Tool for the Prosthetic Foot Modeling and Stiffness Optimization
Computational and Mathematical Methods in Medicine
Volume 2012 (2012), Article ID 421796, 8 pages
http://dx.doi.org/10.1155/2012/421796
Research Article
Software Tool for the Prosthetic Foot Modeling and Stiffness Optimization
^1Faculty of Ele... | 4 | [
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