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Brightness of bulbs 1. The problem statement, all variables and given/known data There are two bulbs, one of 100W and one of 50W and a 120V battery. First, connect them in parallel, find the resistance and current of each and determine which will shine brighter and by what factor. Next connect them in series, again fin...
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Sum of a part arithmatic and part geometric sequence October 22nd 2009, 09:53 PM #1 Newbie Joined Oct 2009 Posts 3 Please Help me. Sequence Question There are 4 positive numbers in a sequence. The first three are in Arithmatic sequence and the last three are in geometric sequence. If the differe...
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Basis ambiguity Maybe you should explain what this is for. I guess I just want to follow that paper in depth, and to do that, I want to get a better intuitive understanding of some of the material. In any case, you inspired me to prove that it's impossible in general, assuming we're sticking to orthonormal bases: [t...
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Novel Node Localization Algorithm Based on Nonlinear Weighting Least Square for Wireless Sensor Networks International Journal of Distributed Sensor Networks Volume 2012 (2012), Article ID 803840, 6 pages http://dx.doi.org/10.1155/2012/803840 Research Article Novel Node Localization Algorithm Based on Nonlinear Weigh...
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Expected amount a person wins/looses after m games at a casino October 15th 2011, 07:48 PM #1 Newbie Joined Oct 2011 Posts 1 Hi everyone, Assume that Jack goes to a casino. He plays n games. Every time he wins a game he gets 100$ and every time he looses a game he looses 50$. The probability that he ...
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semisimple rings July 2nd 2010, 02:07 PM dori1123 semisimple rings If $R$ is a division ring and $V$ is a left vector space over $R$ with $dim(V)=n$, then $End_R(V)$ is isomorphic to $Mat_n(R^{op})$ and $End_R(V)$ is a left semisimple ring. I already prove the part that $End_R(V)$ is isomorphic to $Mat_n(R^...
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Proving matrix addition theorem September 19th 2009, 03:37 PM skeeterrr Proving matrix addition theorem Hi, I'm in first year university and I'm new to proofs, so I was wondering if anyone here can help me out. The questions ask to prove: 1) A + (B + C) = (A + B) + c and 2) For each m x n mat...
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Direction Finding for Bistatic MIMO Radar with Uniform Circular Array International Journal of Antennas and Propagation Volume 2013 (2013), Article ID 674878, 6 pages http://dx.doi.org/10.1155/2013/674878 Research Article Direction Finding for Bistatic MIMO Radar with Uniform Circular Array National Laboratory of Ra...
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how do you graph in 3d? October 28th 2010, 07:30 PM #1 Junior Member Joined Oct 2008 Posts 65 how do you graph in 3d? for example, these two functions: d = ax + by + cz and d = ax^2 + by^2 + cz^2 I know the first one is a plane and i think the second one is an ellipse in 3d, so kind of lik...
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Trajectories in phase space April 15th 2010, 10:53 AM #1 Newbie Joined Mar 2010 Posts 6 the functions x(t) and y(t) satisfy: x'=x+ 2xy y' =-3y + xy a) show that the solution trajectories in x,y phase space are given by ln|(x^3)y| = x +2y + constant b) determine the critical point...
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volume of a region bounded by two surfaces March 22nd 2008, 07:44 AM #1 Newbie Joined Jul 2007 Posts 19 volume of a region bounded by two surfaces I have this problem find the voulme of the solid bounded above by surface z=50-4(y^2) and below by z=9(y^2)+14 I only know how to calculate voul...
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1d wave eqution (help urgent) October 19th 2012, 04:58 PM princessmath 1d wave eqution (help urgent) Attachment 25289 Basically, I have to use u = Real (f(x)e^-iwt) and sub it into the wave equation. Simplify it etc, then use say u= e^at to solve the characteristics equation. However, I get s...
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Consumer Arithmetic September 5th 2009, 08:26 PM JadeKiara Consumer Arithmetic (Nod) Hello everyone! I was just wondering if someone could explain these questions to me (and how to solve them). I seem to be having a memory block. Thanks in advance. 1. Claudia, to save for her trip to the Gold Coast, puts he...
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Robust Joint Analysis with Data Fusion in Two-Stage Quantitative Trait Genome-Wide Association Studies Computational and Mathematical Methods in Medicine Volume 2013 (2013), Article ID 843563, 12 pages http://dx.doi.org/10.1155/2013/843563 Research Article Robust Joint Analysis with Data Fusion in Two-Stage Quantitat...
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Math Help $n^2 + n - 2 = (n+2)(n-1) = 0$ (not sure what the latex symbol is for equivalent) so n=1 or -2 which is equivalent to 1 and 40 in mod 42. First note that may be a better way $n^2+n-2=(n+2)(n-1)=0$ this gives two solutions $n=1,n=-2 \equiv 40 \mod(42)$ Note now that $42=2\cdot 3 \cdot 7$ So the only zero div...
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jacobian matrix. derivatives September 27th 2009, 12:43 PM #1 Member Joined Nov 2008 From MD Posts 165 calculate the jacobian matrix of the function at the given point. and write the formula for the total derivative. M(x1,x2,x3,x4)= ( (x1+x2)/(x3+x4), (x3+x4)/(x1+x2) ) a= (1,1,1,1) how do...
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Physics Forums - View Single Post - What will be the events relative to the ground observer , a time-like or space like? ghwellsjr Adel, I'm going to try to explain what time-like and space-like mean, and why if two events have one type of likeness in one frame, they have the same type of likeness in all frames. Ag...
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Physics Forums - Finding T(v) relative to B and B' dzimitry Aug9-10 03:00 AM finding T(v) relative to B and B' 1. The problem statement, all variables and given/known data find T(v) using the matrix relative to B and B' T(x, y, z) = (2x, x + y, y + z, x + z) v = (1, -5, 2) B = { (2, 0, 1), (0, 2, 1), (1, 2, 1) }...
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Moment of inertia of a uniform solid sphere Posted this question in the calculus section but I guess it's more of a basic physics question, so I've copied it here - Taking a uniform solid sphere of radius R and mass M, with the centre of mass at the origin, I divided it into infinitesimal disks of thickness dx, and ra...
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Dynamic Response in Transient Operation of a Variable Geometry Turbine Stage: Influence of the Aerodynamic Performance International Journal of Rotating Machinery Volume 2013 (2013), Article ID 735321, 11 pages http://dx.doi.org/10.1155/2013/735321 Research Article Dynamic Response in Transient Operation of a Variabl...
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linear Algebra (1.14) July 16th 2008, 06:13 AM #1 Junior Member Joined Apr 2008 From Gainesville Posts 68 linear Algebra (1.14) Let V and W be vector spaces and T:V --> W be linear. a) Prove that T is one-to-one if and only if T carries linearly independent subsets of V onto linearly independent...
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Finding the Solution in a Quadratic Equation? February 27th 2010, 05:20 PM BlueLeader Finding the Solution in a Quadratic Equation? Greetings, I'm back again with a few problems I'm stuck on. I'm really not sure where to go with them, or how to solve them. Unfortunately I'm a complete dunce when it comes to...
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A Nonparametric Shewhart-Type Quality Control Chart for Monitoring Broad Changes in a Process Distribution International Journal of Quality, Statistics, and Reliability Volume 2012 (2012), Article ID 147520, 10 pages http://dx.doi.org/10.1155/2012/147520 Research Article A Nonparametric Shewhart-Type Quality Control ...
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Fractional Difference Equations with Real Variable Abstract and Applied Analysis Volume 2012 (2012), Article ID 918529, 24 pages http://dx.doi.org/10.1155/2012/918529 Research Article Fractional Difference Equations with Real Variable ^1School of Mathematical Sciences, Xiamen University, Xiamen, Fujian 361005, China...
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IntroductionSystem and Algorithm Design for the SensorSystem DesignMultiple-Table Lookup AlgorithmSuspension Gap Fluctuation Compensation AlgorithmReason Analysis for Phase Signal DistortionErrors caused by suspension gap fluctuation compensation algorithmErrors caused by joint gaps of long stator sectionsA New Kind of...
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Stored spring energy Register to reply by lemon Tags: energy, spring, stored P: 201 Hi - Would someone check my method here please? Thank you 1. The problem statement, all variab...
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linear independence CAN somebody,please write down the definition for the linear independence of the following functions? { $e^x,e^{2x}$} As in any vector space, the set $\{e^x, e^{2x}\}$ is linearly independent iff whenever there are scalars $a,b \in \mathbb{F}$ (where $\mathbb{F}$ is your underlying field) such that...
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find the numbers of boys September 19th 2013, 03:26 AM #1 Newbie Joined Sep 2012 From Pak SarzmeeN Posts 17 The boys of a school can be arranged in 12 15 and 18 equal rows and also into a solid square. What is the least number of boys that school can have? (Hint find the lcm) and the answer is 900...
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Gravitational Radiation from Post-Newtonian Sources and Inspiralling Compact Binaries Abstract 1 Introduction 1.1 Gravitational-wave generation formalisms 1.2 Problem posed by compact binary systems 1.3 Post-Newtonian equations of motion and radiation Part A: Post-Newtonian Sources 2 Einstein’s Field E...
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tangent lines September 27th 2007, 10:42 PM mer1988 tangent lines For what values of a and b are y = a b^x and y = 1 + x tangent at x = 0. how do i start this one?? September 28th 2007, 12:58 AM ticbol Let f(x) = y = a*b^x -------------(i) And g(x) = y = 1 +x If f(x) and g(x) are tangent at ...
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Patent US5287529 - Method for estimating solutions to finite element equations by generating pyramid representations, multiplying to generate weight pyramids, and collapsing the weighted pyramids The Government has rights in this invention pursuant to contract Number F-30602-89-C-0022 awarded by the Department of the A...
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show encryption and decryption are identical April 28th 2008, 07:54 AM #1 Member Joined Feb 2008 Posts 125 show that the encryption procedure C=P^e(mod n) and decryption procedure P=C^d(mod n) in RSA cryptosystem are identical when encryption is done using modular eponentiation with modulus n=35 and e...
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help finding foci June 25th 2008, 01:04 PM #1 Newbie Joined May 2008 Posts 4 x^2+8y^2+6x-16x+1=0 x^2+6x+9 +8(y^2-2y+1)=-1+9+1=9 (x+3)^2/9 + 8(y-1)^2/9 h=-3 i am supposed to get sqrt 14 but i just dont see how. Can somebody please explain to me why it is supposed to be sqrt 14? Thank Yo...
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[SOLVED] Volume by integration not quite working out April 13th 2009, 04:15 PM #1 Junior Member Joined Mar 2009 Posts 58 [SOLVED] Volume by integration not quite working out Hi all, my first post to this fine forum. I've been studying (on my own) and I'm doing volumes by integration at the moment. I've j...
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Find derivative August 1st 2012, 04:52 PM #1 Junior Member Joined Jul 2012 From auckland Posts 46 Find derivative so i did these questions are they right ? the working and all ?? Find the dervative θ= 3r+2/2r+3 dθ/dr= d/dr (3r+2)(2r+3)-(3r+2)d/dr(2r+3)/ (2r+3)^2 dθ/dr= 3(2...
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f(x + h) -f(x)/h ......can someone please show me the steps and answer to this Find f(x+h) - f(x) for f(x) = x (squared) +5x - 1 h Hello, wayneo1688! I assume you're new to the Difference Quotient. Find $\frac{f(x+h) - f(x)}{h}$ . for . $f(x) \:= \:x^2 +5x - 1$ Don't let the Difference Quotient scare you. . . Break...
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Ordered pairs October 27th 2005, 05:56 PM #1 Junior Member Joined Oct 2005 Posts 50 Last 3 questions for Professor Jameson Lets see if you are a real professor or a simple lecturer... lol, just kidding Let AxB be the set of ordered pairs (a,b) where a and b belong to the set of natural numbers N. ...
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Having trouble with maddening Taylor Polynomials November 9th 2007, 08:15 PM #1 Member Joined Sep 2007 Posts 94 Having trouble with maddening Taylor Polynomials Here's the question: Calculate the Taylor polynomial T1,n(x) for f(x) = ln x a. How many decimal digits are guaranteed in approximati...
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Order - Math Genius Answer Move the frogs in the following order: 2, 4, 6, 5, 3, 1 (repeat these moves in the same order twice more), 2, 4, 6. This is a solution in twenty-one moves—the fewest possible. If n, the number of frogs, be even, we require ^(n²+n)/[2] moves, of which ^(n²-n)/[2] will be leaps and n simple m...
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var/covar of Linear Lease Square estimates April 29th 2010, 04:23 PM #1 var/covar of Linear Lease Square estimates Goal: Find, $Var(\hat B_0)$ and $Covar(\hat B_1, \hat B_0)$ $($Note: $y_i = B_0 + x_i B_1 +e_i,$ with $e_i$ ~ $N(0,\sigma ^2)$ So, everything is fixed, but $e_i$ and $y_i.$ Now I found unbiased ...
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an ODE question February 14th 2010, 04:56 PM #1 Junior Member Joined Oct 2009 From Aberystwyth, Wales Posts 36 an ODE question ok i have a question im really stuck on $x^3\frac{dy}{dx} + 3x^2y = \frac{1}{x+2}$ for this i used the substitution u = x^3y and end up with $(x+2)\frac{du}{dx} + 3u...
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Integrate sqrt(1 +a^2*x^2)dx You want to do a trig substitution so that the square root term will disappear. Have you tried subbing tangent, secant, cotangent, or cosecant in for x? Hello, j-lee00! Integrate: . $\int \sqrt{1 +a^2x^2}\,dx$ Let: $ax \:=\:\tan\theta\quad\Rightarrow\quad dx \:=\:\frac{1}{a}\sec^2\!\theta\...
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Complex number October 27th 2012, 09:00 AM #1 Newbie Joined Oct 2009 Posts 24 Complex number What is 3^(3+ i(8pi/ln3)) The answer is a number...... Work done so far 3^3 * 3^( i8pi/ln(3) ) = 27 * (3^ i8pi - 3^ln(3) ) = 27 *( 3^25.1i -3.34) 3^(3+ i25.1) - 90.26 I am not sure how...
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Patent US4658323 - RMS calculation circuit for digital circuit interrupters BACKGROUND OF THE INVENTION A digital circuit interrupter capable of complete implementation by means of very large scale integrated circuit techniques is described within U.S. patent application Ser. No. 631,708 filed July 17, 1984 in the nam...
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Patent US6968491 - Generating a check matrix for error correction RELATED APPLICATIONS This application is related to U.S. patent application Ser. No. 10/119,224, entitled “ERROR CORRECTION FOR DATA COMMUNICATION,” and U.S. patent application Ser. No. 10/119,223, entitled “TRANSMITTING DATA IN A COMMUNICATION NETWORK,...
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Drawing Dynamical and Parameters Planes of Iterative Families and Methods The Scientific World Journal Volume 2013 (2013), Article ID 780153, 11 pages http://dx.doi.org/10.1155/2013/780153 Research Article Drawing Dynamical and Parameters Planes of Iterative Families and Methods ^1Instituto de Telecomunicaciones y A...
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Urgent: Vectors November 19th 2005, 01:47 AM #1 Member Joined Jul 2005 Posts 187 Urgent: Vectors Find the value of parameter m that vector p->=ma->+17b-> and vector q->=3a->-b-> would be across if |a->|=2 and |b->|5 and the angle between a-> and b-> is 120 degree. The math book shows that the answe...
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Patent US6864897 - Analysis, synthesis and control of data signals with temporal textures using a linear dynamic system FIELD OF THE INVENTION This invention relates generally to processing data signals, and more particularly to synthetically generating and controlling temporal textures signals. BACKGROUND OF THE INV...
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Solving Coupled System of ODEs in MATLAB 1. The problem statement, all variables and given/known data I am asked to solve a coupled system of 5 ODEs. There is also a function, f, which describes the release of carbon dioxide over time. I am given the release rates at certain values of t and asked to interpolate for ot...
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Economical Feasibility of Utilizing Photovoltaics for Water Pumping in Saudi Arabia International Journal of Photoenergy Volume 2012 (2012), Article ID 542416, 9 pages http://dx.doi.org/10.1155/2012/542416 Research Article Economical Feasibility of Utilizing Photovoltaics for Water Pumping in Saudi Arabia ^1Departme...
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First and Second Derivatives Register to reply by mmajames Tags: derivatives P: 12 1. The problem statement, all variables and given/known data Just trying to find the first and second derivatives. ...
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Newtons Square root method 1. The problem statement, all variables and given/known data Let e be the number close to sqrt(a) by Newtons Method (That is picking a number, diving a by it, and taking their average, divide a by average, get a number, find their average, so on). Using |e <sqrt(a)+e| prove that if |a/e-e|<1...
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Series/Convegence tests! need help on review problems for test! October 29th 2007, 09:34 PM #1 Junior Member Joined Sep 2007 Posts 51 Series/Convegence tests! need help on review problems for test! 1. A certain ball has the property that each time it falls from a height h onto a hard, level surface, it r...
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Growth of the "cube of square root" function up vote 11 down vote favorite 1 Hello all, this question is a variant (and probably a more difficult one) of a (promptly answered ) question that I asked here, at Is it true that all the "irrational power" functions are almost polynomial ?. For $n\geq 1$, let $f(n)$ denote...
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Impossible Question: Maritime Freight AlephZero The geometrical proportions of the sled (the ratio of the height of the CG above the deck and its length) affect the answer as well as the size of the sideways acceleration. Call the length L and the height of the CG position H. Call the weight of the sled W. The forc...
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Estimation of Distribution Overlap of Urn Models Corrections 22 Jan 2014: (2014) Correction: Estimation of Distribution Overlap of Urn Models. PLoS ONE 9(1): 10.1371/annotation/cd4610af-3595-4ea2-9409-71770712f2a9. doi: 10.1371/annotation/ cd4610af-3595-4ea2-9409-71770712f2a9 | View correction Abstract A classical p...
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Hermite polynomials and Schwartz space 1. The problem statement, all variables and given/known data I'm supposed to show that the Hermite Polynomials are in Schwartz space [itex]h_n = \frac{1}{\sqrt{n!}}(A^{\dagger})^n h_0[/itex] where [itex]A^{\dagger} = \frac{1}{\sqrt{2}}(-\frac{d}{dx} + x)[/itex] and [itex]h_0 ...
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Universally measurable sets and weak topology up vote 7 down vote favorite 1 After I posted this question, a couple of months ago, and got from MO-users several good hints, I think i'm ready, after some study, to ask another related question (or rather, to focus on the main point of my previous question, after I got ...
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Linear Differential Equation of Second Order 1. The problem statement, all variables and given/known data I have the equation mx'' + cx' + kx = 0 where m = 2, c = 12, k = 50, x[0] = 0, x'(0) = -8. x is a function of t, and primes denote derivatives w.r.t. t. 2. Relevant equations 3. The attempt at a solution so ...
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Poisson Distribution February 7th 2009, 03:22 PM eigenvector11 Poisson Distribution Given a random sample of size n from a Poisson distribution, lambda hat_1 = X_1 and lambda hat_2 = Xbar are two unbiased estimators for lambda. Calculate the relative efficiency of lambda hat_1 to lambda hat_2. I know th...
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[Haskell-cafe] Proof of induction case of simple foldl identity. Dean Herington heringtonlacey at mindspring.com Sat Mar 14 17:22:55 EDT 2009 At 8:45 PM +0000 3/14/09, R J wrote: >Can someone provide the induction-case proof of the following identity: > > foldl (-) ((-) x y) ys = (foldl (-) x ys) - y > >If foldl i...
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search results Expand all Collapse all Results 1 - 5 of 5 1. CMB Online first Short Probabilistic Proof of the Brascamp-Lieb and Barthe Theorems We give a short proof of the Brascamp-Lieb theorem, which asserts that a certain general form of Young's convolution inequality is saturated by Gaussian functions. ...
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converting rectangular equations into polar form rectangular equation : x^2 - y^2 = 4 use the double angle forumla i have no idea what to do? Hello tomatoesUsing $x = r\cos\theta, y = r\sin\theta$, we get: $r^2\cos^2\theta - r^2\sin^2\theta = 4$ $\Rightarrow r^2(\cos^2\theta - \sin^2\theta) = 4$ But, using the double-...
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Meaning of div and curl brianparks Thanks Tom for the excellent reply. Given your description, I can see how these operators would be useful in the analysis of electromagnetic phenomena. You're welcome. You seem to be pretty good at offering simple introductory explanations of concepts. Would you mind giving a simil...
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Second Order DE October 31st 2009, 05:20 PM #1 Newbie Joined Jul 2008 Posts 6 Second Order DE I'm having trouble trying to solve the differential equation $y^{(2)} + (\frac{1}{4t^2})y=f cos(t), t>0$ given that $y_{1}=\sqrt{t}$ is a solution of the homogeneous equation. I have been trying to solve thi...
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What happens in the restframe with lightsource? ghwellsjr Are you looking at the current English version of the wikipedia.org article on Time Dilation? I cannot see much of what you say you are seeing. I don't see any mention of the word "photon" in the article and I don't see any mention of the expression cΔt'. Te...
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Constraints on Chiral superfield Suppose we have a superfield [itex]\Phi(x,\theta,\bar{\theta})[/itex] this can be expanded in component fields in the standard way as: [itex] \Phi(x,\theta,\bar{\theta})= c(x) + \theta \psi(x) + \bar{\theta} \bar{ζ}(x) + \theta^{2} F(x) + \bar{\theta}^{2} Z(x) + \theta \sigma^{\mu} \bar...
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Speed of skydiver March 19th 2011, 07:29 PM chengbin Speed of skydiver Hi. I have trouble integrating the following problem. The equation is basically $m\frac{dv}{dt} = mg - kv^2$ with the condition when t = 0, v = 50m/s I know this is a separable DE, so rearranaging it becomes $\int \frac{mdv}{mg...
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linear differential operators February 21st 2013, 11:39 AM likelylad Exponential input theorem Hello, I am puzzled about this operation (1) with polynomials in a general proof of Exponential input theorem and I don't understand the the concept of a being s-fold zero. p(D) = q(D)(D - a)^s q(a) = nonzero ...
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Domain and range March 27th 2012, 11:12 PM #1 Newbie Joined Mar 2012 From China Posts 17 Domain and range Hi. Two questions. 1: f(m) = -2 / (-3+9m) i got a domain (-infinity, 0.33) U (0.33, infinity) and range (-infinity, 0) U (0, inifinity). correct? 2: f(w) = 7 / ( -2 + |w| ) ...
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Column buckling answer confirmation Attachment 42439 What is the minimum length of the column at which buckling is likely to occur? The buckling equation is: F= ((∏^2)*E*I)/(K*L)^2 E is the modulus, I is the area moment of inertia, K is the buckling coefficient, and L is the length of the column. the mass moment o...
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Linear Alegebra linear equations proofs January 13th 2010, 05:58 AM #1 Newbie Joined Jan 2010 Posts 1 Linear Alegebra linear equations proofs Prove the following: A system of linear equations Ax = b with m < n either has no solution or has several different solutions. A system of l...
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4 Poisson Models in Stata This unit illustrates the use of Poisson regression for modeling count data. We will be using the poisson command, often followed by estat gof to compute the model's deviance, which we can use as a goodness of fit test with both individual and grouped data. An alternative way to fit these mo...
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Double integration to find the area of a bounded region May 7th 2011, 09:00 PM Glitch Double integration to find the area of a bounded region The question Use double integration to find the area bounded by $y = x^3$ and $y = x^2$ My attempt I know that finding the area of a bounded region is given ...
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Patent US5724270 - Wave-number-frequency adaptive beamforming TECHNICAL FIELD OF THE INVENTION This invention relates generally to sensor array signal processing, and more particularly to the process of adaptive beamforming using a reduced rank k-ω matrix approach. BACKGROUND OF THE INVENTION For linear arrays of hy...
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Numeral system Occasionally the term "number system" is used for this concept, but that is also the name of an altogether different concept; see number system. A numeral is a symbol or group of symbols that represents a number. Numerals differ from numbers just as words differ from the things they refer to. The s...
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ompute MidPoint algorithm (2) What we'd like to do is to use this discriminating function to maintain our trajectory of drawn pixels as close as possible to the desired circle. Luckily, we can start with a point on the circle, (x [0], y[0]+r) (or (0, r) in our adjusted coordinate system). As we move along in steps of ...
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Epsilon delta proofs January 16th 2010, 03:10 AM #1 Epsilon delta proofs I'm having trouble understanding this proof. I understand what the e-d definition is trying to say, and I understand the geometric argument, but... well, consider an example: Prove that $\lim_{x \to 4} 4x-5 = 7$ So, we take the def...
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Proving Trig Identities March 10th 2010, 05:27 PM #1 Newbie Joined Jan 2010 Posts 15 Help proving these identities 1.) tanX-tanY / 1+tanX = cotY-cotX / cotXcotY+1 2.) sin5X + Sin3X / sin5X-sin3X = tan4X / tanX Hello orochimaru700 Can I suggest first that: □ you should copy the q...
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Proof That Girls Are Evil!!!! 1. Re: Proof That Girls Are Evil!!!! "headtrip" wrote: "BBQ Platypus" wrote: 3. The area of this region is calculated by âËâ€*«âËâ€*ž,1(dy/y), which has the same area as the integral calculated in step 2. The area above y=1 and to the right...
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Abstract algebra question 1. The problem statement, all variables and given/known data Show that {1,2,3} under multiplication modulo 4 is not a group but that {1,2,3,4} under multiplication modulo 5 is a group Alright, take, for example, Set {1,2,3,4,5} for modulo 6 and set {1,2,3,4,5,6} modulo 7. A group meets 4 ba...
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Stats: What is a phi coefficient? StATS: What is a phi coefficient? The phi coefficient is a measure of the degree of association between two binary variables. This measure is similar to the correlation coefficient in its interpretation. Two binary variables are considered positively associated if most of the data fa...
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Substituting values and solving for an unknown April 27th 2009, 11:35 AM self_shattered Substituting values and solving for an unknown please give me a solution i need to find the value of V in the following equation (p+(a/V^2))*(V-b)=RT where P=9500KPa R=.2968Kj/k/kg T=175 K a=27R^2*...
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a question involving the determinant... April 5th 2013, 02:51 PM mathlover700 a question involving the determinant... given: A = |a b c| |d e f| det(A) = 5 |g h i| B = |a u c| |d v f| det(B) = -3 |g w i| FIND: |-3a c 2b - u| |-3d f 2e - v| |-3g i 2h - w| -it's p...
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Patente US7422562 - Real-time measurement of ventricular stroke volume variations by continuous arterial pulse contour analysis CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation-in-part of, claims priority of, and incorporates by reference U.S. patent application Ser. No. 10/728,705, filed 5 D...
4
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Determining Subfields October 12th 2010, 04:12 AM demode Determining Subfields (a) Determine all subfields of $\mathbb{Q}(\sqrt{7})$. (b) Prove that $\mathbb{Q}(\sqrt{5}) cong \mathbb{Q}(\sqrt{-3})$. Attempt: For the first part I think $\mathbb{Q} (\sqrt{7})= \{ a+b\sqrt{7} ; a,b \in \mathbb{Q} \}$. So,...
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Category theory/Natural transformation From HaskellWiki 1 Example: map even $ maybeToList $ Just 5 yields the same as maybeToList $ fmap even $ Just 5 yields: both yield 1.1 Commutative diagram • Let $\mathcal C$, $\mathcal D$ denote categories. • Let $\Phi, \Psi : \mathcal C \to \mathcal D$ be functors. ...
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Limit of polynimials April 3rd 2012, 06:10 PM Kingdu8457 Limit of polynimials If f and g and polynomials and lim(x approaches infinity) of [f(x)/g(x)] = L, L not 0, show that f and g are of the same degree. I just can't get this one! April 3rd 2012, 06:41 PM Prove It Re: Limit of polynimials If f(x)...
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Isoc.html The above applet graphs two segments with a common vertex, and then shows the locus of points such that the segments subtend congruent angles ζ (defined by the blue segments) and ψ (defined by the green segments). It turns out that, in general, the curve is shaped like a Greek letter φ. Strangely, on the red ...
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Patent USRE42534 - Bicubic surface real-time tesselation unit CROSS-REFERENCE TO RELATED APPLICATIONS The present invention is a continuation of U.S. application Ser. No. 10/732,398, now U.S. Pat. No. 7,245,299, entitled “Bicubic Surface Real-Time Tesselation Unit”, (1935CIP2) filed Dec. 9, 2003, issued on Jul. 17, 20...
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Ball in cone issue bahamagreen tan(x) = r/(h-r) Why? The point where circle and the tilted surface meet (what your denominator should be) is closer to the apex than the center of the ball (your denominator here). You need the sine: sin(x) = r/(h-r) Solve for h: ##h=r+\frac{r}{\sin(x)}## Plug this into tan(x) = ...
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Two small things with Complex Numbers September 27th 2009, 06:24 AM #1 Newbie Joined Sep 2009 Posts 19 1) I got: $z=2+2i$ and I have to find the polar representation of z. Them find $z^4$ and $x+iy$ (when it's polar)... My bid: $w=rCos+i rSin$ to find the polar representation... right? So...
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Quick question about finite area / infinite area April 20th 2008, 02:24 PM larson Quick question about finite area / infinite area Here's a question I have... Let S be the region between the graphs $y = \frac {1}{x}$ and $y = \frac {1}{\sqrt {x}}$ between x = 0 and x = 1. Does S have finite area? Justify yo...
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Patent US4954837 - Terrain aided passive range estimation This invention was made with U.S. government support under Contract No. F-3060-2-88-C-022. The U.S. government has certain rights in this invention. BACKGROUND OF THE INVENTION There are many applications where it is critical for a groundbased or airborne plat...
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Different infinities problem sludger13 Because there exists such an arrangement of matter that creates a statue of unicorn, or a movie with moving unicorn, or a brain structure that can somehow imagine unicorn. The concept of unicorn is real because there exists an arrangement of matter that we can define as unicorn...
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MOCP 1997-1998 Problem Set 6 Problem Set 6 31. Find all continuous functions f: R ®R such that for every x , y Î R . 32. Let n ³ 3 be a natural number. Prove that 33. Let n ³ 3 be a positive integer. Are there n posit...
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Congruences May 7th 2009, 06:13 AM ShootTheBullet Congruences Hi, I'm looking for any help towards showing the following: given a and m are coprime, prove that ax $\equiv$ b (mod m) has a unique solution mod m. Any help would be much appreciated, and thank you for your time. May 7th 2009, 06:25 AM Ga...
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Integration without Trig Sub July 11th 2009, 06:26 AM #1 Junior Member Joined Jul 2009 Posts 37 How would I work the integral: x^3 * sqrt(x^2 -9) dx without using trig substitution? My professor said that it is a way, but I don't see it! THanks! AH! Never thought of that! Thank you! Ho...
5
[ -0.00445556640625, -0.031494140625, 0.040771484375, -0.0189208984375, 0.01953125, 0.044921875, -0.09423828125, 0.0211181640625, -0.0299072265625, -0.06640625, 0.09814453125, -0.016845703125, -0.044677734375, 0.0498046875, 0.025634765625, -0.0013275146484375, 0.01483154296875, 0.031...
23,797
23797
Contribution to the Modelling of the Tribological Surface Transformations ISRN Tribology Volume 2013 (2013), Article ID 254705, 6 pages http://dx.doi.org/10.5402/2013/254705 Research Article Contribution to the Modelling of the Tribological Surface Transformations ^1Laboratoire de Mécanique et d'Acoustique, UPR CNRS...
4
[ -0.04833984375, 0.00848388671875, 0.0830078125, -0.056640625, 0.00174713134765625, -0.04541015625, -0.07421875, 0.07080078125, 0.0400390625, 0.0205078125, -0.04345703125, -0.111328125, 0.048828125, -0.0003299713134765625, -0.03564453125, -0.11279296875, -0.033935546875, 0.011840820...
23,798
23798
tough integral? for this tough integral we'll use the following substitution: $\begin{gathered}<br /> t = \frac{1}<br /> {{1 + x^4 }} \hfill \\<br /> \hfill \\<br /> dt = \frac{{ - 4x^3 }}<br /> {{\left( {1 + x^4 } \right)^2 }}dx \hfill \\ <br /> \end{gathered}$ $<br /> \int\limits_0^1 { - t^{2006} \left[ {1 + \left( {...
5
[ 0.0986328125, 0.0147705078125, 0.0712890625, 0.0125732421875, -0.07958984375, -0.038818359375, -0.027587890625, 0.0341796875, -0.045654296875, -0.02294921875, -0.01416015625, -0.057861328125, 0.0634765625, -0.045654296875, -0.10302734375, 0.0751953125, -0.00860595703125, -0.0368652...
23,799
23799