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Common Fixed Point Results for Mappings with Rational Expressions Abstract and Applied Analysis Volume 2013 (2013), Article ID 549518, 11 pages http://dx.doi.org/10.1155/2013/549518 Research Article Common Fixed Point Results for Mappings with Rational Expressions ^1Department of Mathematics, King Abdulaziz Universi...
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In how many different ways can a group of 8 people be divide Author Message TAGS: In how many different ways can a group of 8 people be divide [#permalink] 24 Oct 2009, 03:20 ...
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change of measure martingale March 30th 2011, 12:41 AM #1 Junior Member Joined Feb 2011 Posts 56 Thanks 1 change of measure martingale Hallo! There's a given probability space $(\Omega,\mathcal{F},P)$ equipped with a filtration $(\mathcal{G}_t)_{t \in [0,T]}$ and a subfiltration $\mathcal{F}_t \...
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A few problems...Compound & double-angle trig. formulae May 13th 2009, 01:31 PM Maccabhoy A few problems...Compound & double-angle trig. formulae Im stuck on a few questions... Any ideas? 1) Solve the following equation for θ in the interval 0 ≤ θ ≤ 2π. sin( 2 θ) +5/9 cos( θ) = 0 2) Solve ...
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Finding coefficients for a power series solution for a differential equation (Trig) December 3rd 2011, 03:33 PM #1 Super Member Joined Nov 2008 Posts 597 Finding coefficients for a power series solution for a differential equation (Trig) The question and my work are attached. I'm having trouble doing the...
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Math Help May 21st 2011, 08:54 AM #1 MHF Contributor Joined Mar 2010 From Florida Posts 3,093 Thanks 5 Equality For non-zero a,b,c $a^2+b^2+c^2+\frac{1}{a^2}+\frac{1}{b^2}+\frac{1}{c ^2}\geq 6$ show also that equality holds if and only if $a,b,c\in\{-1,1\}$. How can I show this? ...
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the encyclopedic entry of magnetic scalar potential The magnetic potential provides a mathematical way to define a magnetic field in classical electromagnetism . It is analogous to the electric potential which defines the electric field in electrostatics . Like the electric potential, it is not directly obs...
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[Haskell-beginners] Monads... Cory Knapp thestonetable at gmail.com Thu Jan 29 09:48:42 EST 2009 Thanks to both of you, I'll look into those. Cory Rafael Gustavo da Cunha Pereira Pinto wrote: > Cory, > > The big hit for me was Phillip Wadler's paper "Monads for functional > programming" I made me start thinking "w...
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Some Analogies of the Banach Contraction Principle in Fuzzy Modular Spaces The Scientific World Journal Volume 2013 (2013), Article ID 205275, 4 pages http://dx.doi.org/10.1155/2013/205275 Research Article Some Analogies of the Banach Contraction Principle in Fuzzy Modular Spaces Department of Mathematics, Faculty o...
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Ring help March 4th 2007, 12:02 PM chadlyter Ring help Two questions: 1. If R is a ring then is every element of R either a unit or zero-divisor. COnversely 2. IF R is a ring, then there is no elements of R which is both a unit and a zero-divisor. March 4th 2007, 04:44 PM ThePerfectHacker Q...
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CFD Analysis of Heat Transfer and Friction Factor Characteristics in a Circular Tube Fitted with Quadrant-Cut Twisted Tape Inserts Mathematical Problems in Engineering Volume 2013 (2013), Article ID 273764, 8 pages http://dx.doi.org/10.1155/2013/273764 Research Article CFD Analysis of Heat Transfer and Friction Facto...
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Limits and Continuity - two variable function May 20th 2009, 10:22 PM #1 Member Joined Mar 2009 Posts 133 Limits and Continuity - two variable function Hello MHF, Needing some help with this question, What condition must the nonnegative integers $m,n,p$ satisfy to guarantee that $\lim_{(x,y)\to(...
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Revenge of the Integrals April 26th 2006, 02:33 AM Sophie Revenge of the Integrals Just when I thought I was getting good at integration and logarithms, I encountered this question: Find indefinite integral of 3^(2x-1) I'm sure the method is quite simple-- I just want to know how to get to the solution...
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more basic calculus can some show me step by step please thanks http://img297.imageshack.us/img297/8017/dsc01415.jpg Show you what. I don' see anything. Are you talking about how you want someone to show you "Step-by-Step" the sitcom? I hated that show.(Angry) Nevermind, I can see it now. f) $\frac{1}{4}x^4+C$ The on...
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Lagranges Theorem January 5th 2010, 03:18 PM #1 Junior Member Joined Dec 2009 Posts 30 Lagranges Theorem Prove Lagranges Theorem - the order of every subgroup H of a finite group G of order n is a divisor of n. Show that the set G = {1,-1,i,-i} (i - (sqrt of -1)) forms a group with respect to mul...
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Dynamic CMOS Load Balancing and Path Oriented in Time Optimization Algorithms to Minimize Delay Uncertainties from Process Variations VLSI Design Volume 2010 (2010), Article ID 230783, 13 pages http://dx.doi.org/10.1155/2010/230783 Research Article Dynamic CMOS Load Balancing and Path Oriented in Time Optimization Al...
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Creative Factoring Trinomials ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┯━━━━━━━━━┓ ┃ The AC Method for Factoring Trinomials. ...
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Powers series and diffy q's April 17th 2007, 03:23 PM #1 Junior Member Joined Feb 2007 Posts 25 Powers series and diffy q's f(x) = E(0, inf) [((-1)^n)(x^2n)]/(2n+1)! And I found f'(x) to be E (0,inf) [2n((-1)^n)(x^(2n-1))]/(2n+1)! The question is: Show that y = f(x) is a solution to the dif...
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A Godunov-Mixed Finite Element Method on Changing Meshes for the Nonlinear Sobolev Equations Abstract and Applied Analysis Volume 2012 (2012), Article ID 413718, 19 pages http://dx.doi.org/10.1155/2012/413718 Research Article A Godunov-Mixed Finite Element Method on Changing Meshes for the Nonlinear Sobolev Equations...
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Automorphisms March 28th 2011, 05:27 PM topsquark Automorphisms This one is mostly a problem with the definitions, I think. I am asked to prove that $\text{Aut} \mathbb{Z}$ is isomorphic to $\mathbb{Z}_2$, where $\text{Aut} \mathbb{Z}$ is the group of all automorphisms of $\mathbb{Z}$. Obviously the id...
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Green's theorem February 23rd 2009, 10:35 AM #1 Newbie Joined Feb 2009 Posts 1 Green's theorem The question I am attempting is; Verify Greens Theorem for ∫(4x-3y²)dx+(y-4x²)dy C Where c is the boundary of the region defined by y = x^4 and y = x, My problem is that I am getting two diffe...
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how to solve log2 (x) = log2(2x-1) June 21st 2011, 11:10 PM #1 Member Joined Jul 2009 From London Posts 109 how to solve log2 (x) = log2(2x-1) Hi I tried: log2(x) - log2(2x-1) = 0 but then log2(0) not possible so could go nowhere with that. I know 2^(log2(2x-1)) = 2^log2(x) but doe...
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gamma distribution February 21st 2009, 07:07 PM #1 Member Joined May 2008 Posts 103 gamma distribution If a company employs n salespersons, its gross sales in thousands of dollars may be regarded as a random variable having a gamma distribution with α=80(n)^(1/2) and β=2. If the sales cost $8,000 per...
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Linear Congruences November 19th 2009, 07:04 AM #1 Newbie Joined Dec 2008 From Philadelphia Posts 24 Linear Congruences How do i prove that for every prime p > 5, the following system has a solution: 7x + 3y = 1 mod p 4x + 6y = -1 mod p Solve like a pair of linear equations Why not try...
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Fairly basic natural logs question September 3rd 2012, 02:04 PM kedaha Fairly basic natural logs question Returning to differentiation after a fairly long break and presented with three questions. I'm sure there's a simpler way to do them, but I can't figure it out? 1. y(x) = ln[(f(x)+g(x))^2] => y(x) = ln[...
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bounded continuous function May 20th 2010, 08:46 AM cp05 bounded continuous function must a bounded continuous function on R be uniformly continuous? I know that if a function is continuous on a closed and bdd set then its uniformly continuous, but this says nothing about the set, just the function. Would th...
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Investment Problem find rate November 19th 2008, 07:53 AM #1 Junior Member Joined Oct 2008 Posts 26 Investment Problem find rate $6000 is deposited into an account. It grows to $10000 in 8 years. What is the interest rate assuming an annual compound? I'm not exactly sure what to do please help! ...
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Steps to Transpose an Equation October 22nd 2012, 01:09 AM wardr1 Steps to Transpose an Equation Hello, I’m brand to this site and I’m hoping that someone can show me the individual steps that allows the following equation: t = P*R/S*E-0.6*P Transpose to make P the subject per the following equati...
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HELP! please. very urgent. precal. January 8th 2008, 03:17 PM #1 taylorr556 Guest ok here are some questions i need help with ASAP. 1)express this using rational exponents: 5 times the square root of 81x^(3)y^(8) (theres also a little 4 above the beginning of the radical.) 2)a scientist has 37 grams of...
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abelian group May 25th 2009, 06:17 AM #1 Member Joined May 2009 Posts 86 abelian group Suppose that G is a finite Abelian group that has exactly one subgroup for each divisor of |G|. Show that G is cyclic. Use the fundamental theorem for finite Abelian groups twice. Once to show that it is sufficien...
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Solution Solution to puzzle 33: Harmonic sum Let H[0] = 0 and H[n] = 1/1 + 1/2 + ... + 1/n. Show that, for n > 0, H[n] = 1 + (H[0] + H[1] + ... + H[n−1])/n. We will use mathematical induction on n, the harmonic sum subscript. The induction will consist of two steps: 1. Basis: Show the proposition is true for H[1...
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remainder when divided by 7 What is the remainder when (1^3)+(2^3)+(3^3)+...+(1990^3) is divided by 7? Try to prove: If x is integer, then x^3(mod7)=0 or 1 or 6 We need merely note that $\displaystyle \left\lfloor\frac{1990}{7}\right\rfloor=284$ and that $\displaystyle 7\cdot 284=1988$. From this we can note that $\d...
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Question with Diff Eq September 21st 2009, 04:56 PM Katzenjammer Question with Diff Eq I haven't had Diff Eq, and in my notes for an unrelated class, part of a way to solve a solution was with the following diff eq. (d^2)x/d(t^2) + a^2 * x = 0 | a=constant; t=0; dx/dt = 0 I really don't know what to d...
4
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On the Cardinality of the International Journal of Combinatorics Volume 2014 (2014), Article ID 798074, 7 pages http://dx.doi.org/10.1155/2014/798074 Research Article On the Cardinality of the -Topologies on a Finite Set Department of Mathematics, Faculty of Science, King Khalid University, Abha, Saudi Arabia Rece...
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Derivative f'(0) for f(x) =x*(x-1)(x-2)....(x-96) April 19th 2013, 08:02 AM #1 Junior Member Joined Mar 2013 From moon Posts 56 Hello So I tried solving this substituting x = 0 then I get f'(x) = 0. But that seems to be wrong. If I use the product law of derivatives then I get 0*(0-1)*(0-...
5
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Find the Inverse? September 22nd 2009, 07:22 PM #1 Junior Member Joined Sep 2009 Posts 32 Find the Inverse? Hello, I've been trying to figure out how to solve this function but I keep getting stuck. The question asks: Find a formula for the inverse of the function: y = e^x / 1+5e^x My teac...
5
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Pre-Calc Word Problem Help February 12th 2011, 08:22 AM rohitgudi Pre-Calc Word Problem Help I need help on word problems in my math book, I still have problems understanding how to do "mixture problems and sharing job problems." Please offer any tips possible in getting better at solving them. 55. The ...
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Math Help April 25th 2010, 03:26 PM #1 Newbie Joined Feb 2010 Posts 17 Groups In Z/6Z define [a] * [b] =[a+b-1]. Is that associative? If so, does this operation make Z/6Z into a group? If its not in the group explain why? Attempt: ([a] * [b]) * [c] = [a + b - 1] * [c] = [a + b + c - 2] [a]...
5
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Special Product June 24th 2011, 01:15 AM #1 Special Product (ax+y)^2 normally i would answer it as : (a^2)(x^2)+(y^2) but with special products it would be: (a^2)(x^2 ) + ( 2axy ) + ( y^2 ) does that mean (a^2)(x^2)+(y^2) is wrong? Re: Special Product What do you mean by...
4
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search results Expand all Collapse all Results 1 - 25 of 37 1. CJM 2014 (vol 66 pp. 902) Corrigendum to Example in "Quantum Drinfeld Hecke Algebras" The last example of the article contains an error which we correct. We also indicate some indices in Theorem 11.1 that were accidently transposed. Keywords:...
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Very nice (but quite tough) puzzle November 15th 2009, 08:20 AM Boysilver Very nice (but quite tough) puzzle If X and Y are two independent identically distributed real valued random variables, show that $5 \mathbb{P}(|X-Y| \leq 1) \geq \mathbb{P}(|X-Y| \leq 2)$. Here's the hint: For $n,m \in \mathbb{Z...
4
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Isosceles pizza... May 7th 2012, 03:12 PM #1 Hello! I was looking for help on the 'Net and happened to stumble on this site. It looks good so I just decided to drop in! I have a math test and I need to know if my answer is correct. It's a multiple-choice test, but the answer I'm getting isn't matching any of t...
4
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Level Sets of Random Fields and Applications: Specular Points and Wave Crests International Journal of Stochastic Analysis Volume 2010 (2010), Article ID 621038, 22 pages http://dx.doi.org/10.1155/2010/621038 Research Article Level Sets of Random Fields and Applications: Specular Points and Wave Crests ^1Departament...
4
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Sum of the first 50 terms May 4th 2011, 01:28 PM #1 Newbie Joined May 2010 Posts 5 Sum of the first 50 terms I recently was given a very old Scottish Qualifications Higher paper from 1987. I could do almost every question easily, but when it came to question 10, I was entirely stumped. I have never been ...
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Stationary point... June 9th 2010, 12:54 AM Punch Stationary point... Find the coordinates of the stationary point of the curve $y=e^xcosx$ for 0 is less than or equal to x and x is less than or equal to $/pi$ . Leave your answer in exact form. June 9th 2010, 12:58 AM mr fantastic First get dy/dx (use the...
4
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Evaluating Improper Integrals August 5th 2007, 11:40 AM #1 Member Joined Jun 2007 Posts 131 Evaluating Improper Integrals Hi Again I have another question for you that I'm stuck on. I get an answer on ipi*e^(ipi/6) can anyone confirm this? Heres the question: Note that theorem 1.1 i...
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supremum infimum November 12th 2010, 05:40 AM #1 MHF Contributor Joined Nov 2008 Posts 1,401 supremum infimum if f is bounded in a non empty group D and if c<0 then cf is bounded and *-multiply cf- c*f then prove that: sup(cf)(D)=c*inf(f)(D) inf(cf)(D)=c*inf(f)(D) the prove in th...
4
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Implication theorem November 8th 2009, 01:40 PM kashifzaidi Implication theorem The following theorem has the form of an implication. If n is an integer and 3n+2 is even, then n is even. a) Prove this theorem by contradiction. b) Give a direct proof of this theorem. (Hint: it may be useful to g...
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Math problem February 4th 2010, 12:37 AM #1 Newbie Joined Feb 2010 Posts 16 Math problem Can anyone help me to solve this problem: Consider $n$ as a natural number greater than $1$. Prove that sum of all numbers of the form $\frac{1}{pq}$ with the condition $(p,q) = 1$ ( $p$ and $q$ are relatively p...
5
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Please explain this April 8th 2009, 05:59 AM #1 Newbie Joined Dec 2008 Posts 13 Please explain this i don't know how to explain this A relationship between power P, current I, and resistance R in an electric circuit is given by the equation R=P/I^2 Explain the effect a change in current...
4
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the encyclopedic entry of box stoop A Box-Muller transform (by George Edward Pelham Box and Mervin Edgar Muller 1958) is a method of generating pairs of independent standard normally distributed (zero expectation , unit variance ) random numbers , given a source of uniformly distributed random numbers. ...
4
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Span of a subset April 4th 2013, 04:08 PM #1 Junior Member Joined Apr 2012 From New York Posts 30 Span of a subset I just need to know how to start this... I'm looking through my notes but can't figure out how to begin. The wording is also a little bit confusing. Find a finite subset of each of ...
5
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Geometric Sequences I’ve added a script which helps to understand geometric sequences. Suppose you were to draw an equilateral triangle on a sheet of paper. It might look something like this: Now suppose that you draw lines connecting the midpoints of each of the edges of this triangle. This will dissect the larger ...
4
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A Simple Method for Obtaining Coupled Fixed Points of International Journal of Analysis Volume 2013 (2013), Article ID 438029, 7 pages http://dx.doi.org/10.1155/2013/438029 Research Article A Simple Method for Obtaining Coupled Fixed Points of --Contractive Type Mappings ^1Department of Mathematics, Science and Res...
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Proofs of the Infinity of the Prime Numbers The standard proof is due to Euclid: Suppose p is a prime number, and consider the number defined as 1 plus the product of all prime numbers less than or equal to p, that is: n = ...
4
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handshake equation September 10th 2008, 04:28 PM #1 Newbie Joined Sep 2008 Posts 1 ok so I have to create an equation to explain how many handshakes you get if you input any number of people. for instance, i came up with this equation: n=number of people n(n-1) ------- 2 so we know it...
4
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projective dimension I have to find the projective dimension of Z/pZ as Z-module, Z/pZ-module and Z/(p^2)Z-module, p is prime.Could anyone help me? let $M=\mathbb{Z}/p\mathbb{Z}.$ clearly $M$ as $\mathbb{Z}/p\mathbb{Z}$ module is free and so projective. thus $\text{proj} \cdot \dim_{\mathbb{Z}/p\mathbb{Z}} M = 0.$ $M$...
5
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Cognitive Space-Time Transmit Pattern Design International Journal of Antennas and Propagation Volume 2014 (2014), Article ID 141568, 6 pages http://dx.doi.org/10.1155/2014/141568 Research Article Cognitive Space-Time Transmit Pattern Design School of Electronic Engineering, University of Electronic Science and Tech...
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confidence interval help!!!! November 17th 2008, 02:51 PM #1 Newbie Joined Nov 2008 Posts 1 how do you find a confidence interval without knowing the mean or standard deviation?! If it helps, here is the question being asked "construct a 95% confidence interval for the following: N=100 N=...
5
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Normal approx to the binomial dist. questions February 1st 2010, 05:09 PM #1 Normal approx to the binomial dist. questions Q1: An airline finds that 5% of the persons who make reservations on a certain flight do not show up for the flight. If the airline sells 160 tickets for a flight with only 155 seats, wh...
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Inequality Induction Proof 2n+1 < 2^n for all integers n>= 3 November 8th 2011, 08:21 AM yoman360 Inequality Induction Proof 2n+1 < 2^n for all integers n>= 3 So I have an exam tomorrow for my discrete math class and I was doing the suggested practice problems for the exam. So far I understand and know how to do...
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Dimension of the Null Space of Linear Functional April 27th 2009, 03:28 AM #1 Junior Member Joined Apr 2009 Posts 39 Dimension of the Null Space of Linear Functional I need help with showing this: If f is a linear functional on an n-dimensional vector space X, what dimension can the Null Space N(f) ...
5
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Poisson Process March 5th 2007, 02:40 PM #1 Junior Member Joined Nov 2006 Posts 43 Thanks 1 Poisson Process Satellites are launched into space at times distributed according to a Poisson process with rate lambda. Each satellie independently spends a random time (having distribution G) in space before...
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On Generalized Fractional Differentiator Signals Discrete Dynamics in Nature and Society Volume 2013 (2013), Article ID 795954, 7 pages http://dx.doi.org/10.1155/2013/795954 Research Article On Generalized Fractional Differentiator Signals ^1Faculty of Computer Science and Information Technology, University Malaya, ...
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Quantum Character of Electromagnetic Langmuir Oscillations in Conventional Electron-Ion Plasma International Journal of Optics Volume 2012 (2012), Article ID 648741, 8 pages http://dx.doi.org/10.1155/2012/648741 Research Article Quantum Character of Electromagnetic Langmuir Oscillations in Conventional Electron-Ion P...
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Transformation April 3rd 2009, 06:20 AM #1 Junior Member Joined Feb 2009 Posts 36 (2x)d2t/dx2 - 6(dx/dt)^2 = x^2 - 3x^4 show that the substitution y=1/x^2 transforms this differential eqn into d2y/dt2 + y = 3 So i've work out -2/x^3(d2x/dt2) + 6/x^4(dx/dt) i think the latter part of t...
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Math 102 - Word Problem October 8th 2008, 05:06 PM #1 Newbie Joined Oct 2008 Posts 3 Math 102 - Word Problem I need help. I suck at doing Math. Here it goes... An inlet pipe can fill a swimming pool in 9hrs and an outlet pipe can empty the pool in 12hrs. Through an error, both pipes are left op...
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Exponential problem November 28th 2009, 12:45 AM #1 Member Joined Jan 2009 From London Posts 92 Exponential problem Guys, Just a quick one: Can anyone help me with e^((x+2lnx)) which is part of a bigger problem I'm working on? I think that it is e^x + x^2 but apparently this is wrong. I can...
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Exact Solutions and Conservation Laws of a (2+1)-Dimensional Nonlinear KP-BBM Equation Abstract and Applied Analysis Volume 2013 (2013), Article ID 791863, 5 pages http://dx.doi.org/10.1155/2013/791863 Research Article Exact Solutions and Conservation Laws of a (2+1)-Dimensional Nonlinear KP-BBM Equation Internation...
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limit of infinite sequence December 12th 2012, 04:44 AM #1 Junior Member Joined Mar 2012 From malaysia Posts 73 Thanks 11 limit of infinite sequence not sure to put this in pre calculus or calculus, sorry if mistaken Find the following limit. Given that $\frac{\pi}{2}<\theta<\pi$ where $...
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Thermodynamics of the Classical Planar Ferromagnet Close to the Zero-Temperature Critical Point: A Many-Body Approach Advances in Condensed Matter Physics Volume 2012 (2012), Article ID 619513, 15 pages http://dx.doi.org/10.1155/2012/619513 Research Article Thermodynamics of the Classical Planar Ferromagnet Close to ...
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How should I deal with this system of equations? December 27th 2012, 09:03 PM #1 Member Joined Oct 2011 Posts 86 Thanks 2 How should I deal with this system of equations? $0 = \frac{2}{3} + 2C + D$ $0 = 2 +6B +6C + 4D + 4E$ $6 = 10 + 12B - 6C +10D -5E$ $0 = \frac{1}{3} + B + D$ I don...
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Fourier Transform of rect and time shifting. May 26th 2010, 07:08 AM #1 Newbie Joined May 2010 Posts 1 Fourier Transform of rect and time shifting. The transform is simple, but I am sure I am missing something in the end. f(t) = 0 for [-inf --> 2] 8 for [2 --> 6] 0 for [6 --> +inf] ...
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finding logs in terms of another log March 18th 2009, 10:48 AM jlefholtz finding logs in terms of another log I did several of these but am confused by this one. let a= log2 5 and b= log3 2. Express the following in terms of a, b, or both. log2 6=? and log5 3=? cancel the first one, I figured it o...
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Maximum/minimum geometry, not easy September 2nd 2007, 12:22 PM #1 Junior Member Joined Sep 2007 Posts 37 Maximum/minimum geometry, not easy Given a point P in the interior of an angle with vertex O, find points A and B on the sides of the angle so that OA=OB and the sum PA+PB is minimal Could someb...
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Congruence Proof October 19th 2011, 10:20 PM jzellt Congruence Proof Show that if n is a composite integer not equal to 4, then (n-1)! is congruent to 0 (mod n). Please help... Thanks. October 19th 2011, 10:33 PM TheChaz Re: Congruence Proof n = a*b, Suppose n > a > b > 1 Then (n-1)! = (n - ...
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A Volvelle for the Equation of Daylight Dave Abercrombie, abe@rahul.net This volvelle is from Galluci's Theatro del Mundo ye tiempo Granada published 1657 in Venice. It is based on the Equation of Daylight, and is useful for calculations involving "seasonal hours" (aka "unequal hours"). This page outlines the mathema...
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The Modified Parseval Equality of Sturm-Liouville Problems with Transmission Conditions Journal of Applied Mathematics Volume 2013 (2013), Article ID 619358, 11 pages http://dx.doi.org/10.1155/2013/619358 Research Article The Modified Parseval Equality of Sturm-Liouville Problems with Transmission Conditions School ...
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Whats stronger,, round tubing or square ??? Quote: Originally Posted by willys36@aol.com Need to go back to your mechanics of materials course. See this little essay on moment of inertia and radius of gyration of various shapes. Key sentence in this dissertation is "All things being equal, a circular pipe is the m...
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Stability and Hopf Bifurcation Analysis for a Gause-Type Predator-Prey System with Multiple Delays Abstract and Applied Analysis Volume 2013 (2013), Article ID 795358, 12 pages http://dx.doi.org/10.1155/2013/795358 Research Article Stability and Hopf Bifurcation Analysis for a Gause-Type Predator-Prey System with Mul...
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Exponents, unlike mulitiplication, do NOT "distribute" over addition. February 23rd 2010, 09:40 AM sherlewman Exponents, unlike mulitiplication, do NOT "distribute" over addition. i think this is supposed to be an example of an exponent not "distributing over addition? (x-2)2 (x – 2)2 = (x – 2)(x – 2) ...
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Prooving surjective and injective functions October 20th 2009, 10:33 AM neelpatel89 Prooving surjective and injective functions Let g : A -> B and f : B -> C be functions. Show that if f and g are injective, then f o g is injective. Show that if f and g are surjective, then f o g is surjective. i do...
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Dividing Polynomials September 8th 2007, 09:08 AM JonathanEyoon Dividing Polynomials I know how to do the long division method but i'm a bit lost with the synthetic way. What are the rules and method in doing it this way? An example to use (x^6 + x^4 + x^2 + 1) / (x^2 + 1) Thanks alot Septemb...
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Proof involving permutations February 9th 2010, 08:42 AM #1 Junior Member Joined Oct 2008 Posts 54 Proof involving permutations Hi, I have this question and I'm not sure if i'm going about it in the right way. Let $\sigma$, $\tau$ are permutations. Prove that sgn( $\tau^{-1} \sigma \tau$) = sgn...
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Patent US4512020 - Data processing device for processing multiple-symbol data-words based on a symbol-correcting code and having multiple operating modes BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a data processing device for the processing of data words which are composed of k=2p-...
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the encyclopedic entry of Ordinal multiplication In the mathematical field of set theory , ordinal arithmetic describes the three usual operations on ordinal numbers : addition, multiplication, and exponentiation. Each can be defined in essentially two different ways: either by constructing an explicit well-orde...
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Finding theta given csc and cot... September 29th 2007, 11:23 PM #1 Newbie Joined Sep 2007 Posts 17 Finding theta given csc and cot... Generally a problem such as mine would be quite easy, but instead of given constants, I'm given two trigonometric functions: $csc\Theta = \frac{x+6}{x-2}$ $cot\...
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How would you interpret this related rates problem? August 30th 2012, 07:36 PM #1 Newbie Joined Jun 2012 From Canada Posts 20 A child's toy is a flat disk shaped rectangle with a semi-circular end. The length of the rectangle is three times the width and the width is measured to be 8 cm with an error ...
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Integration, general power formula May 3rd 2013, 10:59 AM togo Integration, general power formula Question - integrate the following: (int) (4- (e^x))^3 e^x dx attempt: u = (4 + e^x) n = 3 du = e^x therefore answer is: ((4 + (e^x))^4) / 4 + c which is incorrect, and should be:...
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Remainder theorem April 10th 2011, 08:56 AM Ilsa Remainder theorem The expression $f(x) = ax^3 - ( a + 3b )x^2 + 2bx + c$ is excatly divisible by $x^2 - 2x$. When $f(x)$ is divided by $x - 1$ , the remainder is 8 more than when it is divided by $x + 1$. Factorise $f(x)$ completely. April 10th 2011, 09:04 AM...
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Counter Example in Topology regarding Product Topology April 7th 2012, 10:38 AM #1 Newbie Joined Apr 2012 From Israel Posts 2 Counter Example in Topology regarding Product Topology Hello everyone, I'm in need of some assistance with the following quesiton: Let $\left\{ X_{\alpha}\right\} _{\...
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Metric Space January 10th 2009, 03:53 PM aliceinwonderland Metric Space Show that the limit of a convergent sequence of distinct points in a metric space is a limit point of the range of the sequence. Give an example to show that this is not true if the word "distinct" is omitted. January 10th 2009, 05:37 P...
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Countable set November 9th 2006, 11:45 PM #1 Junior Member Joined Aug 2006 Posts 29 Countable set hello. I cant seem to prove the following: $A,B$ are two different sets such that $A \subset B$ prove that if there exists an injective function $f:A\to B$. then there exists a countable in...
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Applying Cauchy-Goursat theorem/ doing it the "hard way" July 20th 2010, 11:31 AM arbolis Applying Cauchy-Goursat theorem/ doing it the "hard way" I must apply Cauchy-Goursat theorem to show that $\int _C f(z)dz=0$ where $C:=\{ z\in \mathbb{C} ; |z|=1 \}$ and $f(z)=\frac{z^2}{z-3}$. So what I wrote was "f i...
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Initial Value Problems Example 1 Initial Value Problems Example 1 We’re going to move on and go ahead and do some initial value problems. They usually look like and there was basic form. The problem will give you two things dy or dx in an equation with this and at the same time basic initial value problems. You always ...
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Integration by reduction formulae May 7th 2008, 08:43 PM #1 Member Joined Sep 2007 Posts 198 Integration by reduction formulae Given that $I_n =$ $\int_{0}^{1}\frac {1}{(1+x^2)^n} dx$, show that, for n≥2, $2(n-1)I_n = 2^{1-n} + (2n-3)I_{n-1}$ Please help me to solve this. Its less messy t...
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Solving Logarithmic Equations January 6th 2009, 05:54 PM #1 Newbie Joined Jan 2009 Posts 3 Hey guys, I'm having trouble with a couple of grade 12 math questions. A friend of mine told me about this forum, and spoke highly of the positive response to all of his posts. I have been attempting these quest...
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Some New Estimates for the Error of Simpson Integration Rule Abstract and Applied Analysis Volume 2012 (2012), Article ID 239695, 9 pages http://dx.doi.org/10.1155/2012/239695 Research Article Some New Estimates for the Error of Simpson Integration Rule ^1Department of Mathematics, K. N. Toosi University of Technolo...
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Parabola and Line Intersection Points March 14th 2009, 10:29 PM Stevo_Evo_22 Parabola and Line Intersection Points Here is the problem: A graphic designer draws a logo involving a parabola ‘sitting’ in a V shape on a set of axes as shown at right. Find the equation of the parabola, given it is of the ...
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[ 0.0242919921875, 0.025634765625, 0.0029144287109375, -0.046875, 0.0185546875, -0.01611328125, -0.022705078125, 0.045166015625, 0.030517578125, 0.0419921875, 0.052490234375, 0.021240234375, 0.00157928466796875, 0.032470703125, -0.00250244140625, 0.06787109375, -0.07177734375, -0.105...
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Physics Of Billiards The Physics Of Billiards Photo credit: Manatari Physics Of Billiards — Ball Collision The physics behind billiards (or the physics behind pool), in large part, involves collisions between billiard balls. When two billiard balls collide the collision is nearly elastic. An elastic collision is one...
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[ 0.08154296875, 0.00921630859375, 0.000865936279296875, -0.020751953125, 0.017822265625, 0.00823974609375, 0.0198974609375, 0.015869140625, 0.0693359375, -0.006011962890625, -0.023193359375, -0.046875, 0.01287841796875, 0.04345703125, 0.05126953125, 0.0032806396484375, -0.014038085937...
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