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Pan Balance Equations March 30th 2010, 06:52 PM ParisTNK Pan Balance Equations Help! There are two pan balances, the first pan balance has 2 full juice boxes on the left side and on the right side are 18 grapes along with a half-full juice box. The pan balance is equal. The second pan balance has an em...
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Math Forum Discussions Math Forum Ask Dr. Math Discussions Internet Newsletter MathTools Teacher2Teacher Teacher Exchange Workshops Search All of the Math Forum: Views expressed in these public forums are not endorsed by Drexel University or The Math Forum. Topic: comparison between two value in a sample, please h...
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Stuck with Nilpotents October 23rd 2008, 11:35 AM #1 Newbie Joined Sep 2008 Posts 16 Stuck with Nilpotents "Suppose that R is a ring. Then an element $a \in R$ is called nilpotent if there exists a positive integer n so that $a^n = 0$" Ok this is what im stuck with: Assume that R is commutative....
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lowest common denominator in fraction(help me with this problems) 1) $\frac{x}{x^2-5x+4} \ \ , \ \ \frac{x+1}{x^2-16}$ First, factor the denominators: $(x-1)(x-4) \ \ , \ \ (x-4)(x+4)$ The LCD is found by using all the different factors the most number of times they appear in any one denominator. $LCD = (x-1)(x-4)(x+4)...
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Learning Only 36 of the Times Tables Date: 11/04/2001 at 10:39:55 From: Unknown Subject: Multiplying trick Hi, My mother told me of a trick to learn times tables more easily. She said that I only needed to know 36 of the times tables because of the problems that can be reversed to a higher problem. Example: 6...
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Switching Theory Logic Design and Switching Theory [ Up ] [ PLL ] [ Circuit Analysis ] [ Filters ] [ Switching Theory ] The Logic Design Workbench (LDW) is an amazingly s...
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Finite groups with elements of order n up vote 5 down vote favorite 4 Consider a finite group where all elements have the same order $n$. What could be said about such groups? For $n=2$ it could be proved that such group is isomorphic to $(\mathbb{Z}/2\mathbb{Z})^k$. Could it be somehow generalized on case $n>2$? ED...
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Finding basis, dimension and other proofs April 11th 2014, 03:50 AM #1 Newbie Joined Mar 2014 From Alice Springs Posts 8 Finding basis, dimension and other proofs Hey guys, here is a linear algebra problem that I need to do, help would be much appreciated. Consider the functions p1 : R R, p2 :...
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Maximizing Area. January 27th 2010, 06:26 PM #1 Newbie Joined Jan 2010 Posts 19 Maximizing Area. A wire 10 cm long is cut into two pieces, one of length x and the other of length 10 - x. Each piece is bent into the shape of a square. a. Find a function that models the total area enclosed by the two ...
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Determine is a line is tangent to a curve or not? October 7th 2010, 09:15 AM #1 Member Joined Oct 2010 Posts 95 Determine is a line is tangent to a curve or not? Sorry if it sounds silly but I am thinking if there is a way to find out if a line is a tanget of a curve? Say given a curve of $x^2 + 3xy...
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Borel measurable function March 10th 2010, 06:49 PM koko2009 Borel measurable function Hi there, I have a question on real analysis, I will write my try and could you please help me to solve it. we need to prove that f(x)=X^2 ,Q(x)= tanx, and J(x)= -sqrt(x) are borel measurable by the formal definition {...
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Analysis of Signs of Derivatives of an Inverse Function Date: 06/22/2005 at 09:37:35 From: Tommy Subject: The inverse of a concave function I want to be able to reach conclusions about the first and second order derivatives of an inverse function. I have a concave function which I know has f'> 0 and f''< 0. It is a...
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Finding maximal k-degenerate subgraphs up vote 2 down vote favorite Given a graph $G$, let $H$ be a $k$-degenerate (not necessarily induced) subgraph of maximal size. Are there any known lower bounds on $|E(H)|$ for particular classes of $G$ and values of $k$? I've seen several papers on the subject, but only for ind...
4
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About generator and isomorphism problems for free groups operator algebras up vote 3 down vote favorite 2 Let $H$ be an infinite dimensional separable Hilbert space. The $C^{*}$-algebras and von Neumann here unital and subalgebras of $B(H)$. Definition : Let $\mathcal{A}$ be $C^{*}$-algebra (resp. a von Neumann algeb...
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Contraction mapping with no fixed point up vote 5 down vote favorite 1 I am interested in constructing the following "counter-example" to the Banach's fixed point theorem. Let $K=$ {$ g\in L_1: \|g\|=1, g(\cdot)\ge0 $}. Clearly, $K$ is not a compact and $K$ is [S: not :S] closed. [S:My:S] A question is: is it possib...
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Method of Differences January 11th 2008, 08:14 PM #1 Method of Differences Find the sum to $n$ terms of the series $1(1!)+2(2!)+...+r(r!)+...$ Solution Let, $u_r=r(r!)$ If, $f(r)=r!$ then, $f(r+1)-f(r)$ $=(r+1)!-r!$ $=(r+1){\color{red}\text{r}}!-r!\quad\leftarrow$ Wher...
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solving for X with logs May 20th 2011, 05:09 AM #1 Member Joined Mar 2010 Posts 82 solving for X with logs Hi could someone please let me know if this is correct? Log4_X + log4_(x-3)=1 Log4_X + log4_X - Log4_3=1 Change base ln Log4_X= lnX/ln4 Log4_3=ln3/ln4 1=lne^1=lne N...
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Show that the volume of a pyramid of height h whose base is an equilateral triangle o December 3rd 2008, 09:28 PM derrickd Show that the volume of a pyramid of height h whose base is an equilateral triangle o Show that the volume of a pyramid of height h whose base is an equilateral triangle of side s is equal t...
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basic calc two problems! thanks for the help! December 10th 2007, 08:30 PM #1 wpski Guest ok two problems both are totally weird and have no context in my book please help me! 1) The tangent to y=(ax+b)/(sqaureroot of x) at the point where x=1 is 2x-y=1. find a and b 2) Find a given that the tangent ...
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Is there a connected non-affine scheme $S$ such that it is the union of rings of integers of number fields? up vote 7 down vote favorite 3 I was woolgathering about the notion of a scheme, and it occurred to me that I know of no non-affine scheme $S$ that is the union of $Spec(O_K)$'s of some number field $K$ (I allow...
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find distance December 10th 2006, 02:05 AM jim49990 find distance i have a triangular plot of land through which a stream runs. the point B is due east of A and AB is 50m long. the bearing of C from A 026 degrees and the bearing of C from B is 328 degrees. calculate the distances AC and BC. could this p...
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How do I solve this with a direct proof? November 8th 2012, 05:39 AM #1 Newbie Joined Nov 2012 From Unknown Posts 7 How do I solve this with a direct proof? Prove that for all sets X and Y, (X ∩ Y) ∪(Y-X)=Y I'm stuck and I'm not fully sure how to solve this. Re: How do I solve this with a direc...
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how many blue marbles than red? July 31st 2006, 08:32 PM Judi how many blue marbles than red? A jar contained twice as many red marbles as blue marbles. Jill removed n% of the red marbles and increased the number of blue marbles by n%. What is the smallest integer value of n that will result in the jar's now...
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Generating-functions: is there a relationship between a generating function and the corresponding squared generating function up vote 2 down vote favorite Let's say we have a sequence $T(n)$ with the corresponding generating function $$A(t) = \sum_{n = 0}^\infty T(n) t^n$$ Is there some relationship between the two ...
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Number of Combinations August 20th 2008, 10:04 PM #1 Newbie Joined Aug 2008 Posts 3 Number of Combinations G'day, not sure if this the right place to post this... I have 20 dice/triangle-like objects, each with a 1, 2 and 3 on it. How many possible combinations can be made from the 20 obje...
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finding the equation of a hyperbola! Hello, ahztin13! Find an equation of the hyperbola having foci at $\left(5 \pm\sqrt{61},\:-4\right)$ and asymptotes $y \:=\:\pm\frac{6}{5}x - 10$ The equation of a "horizonal" hyperbola is: . $\frac {(x-h)^2}{a^2} - \frac{(y-k)^2}{b^2} \;=\;1$ The center of a hyperbola is the midpoi...
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Fourier transform and orthogonal system December 15th 2011, 02:02 AM Opalg Re: Fourier transform and orthogonal system I don't understand that. The OP's $\phi_0$ is given by $\phi_0(x) = \begin{cases} 1 & x\in[-\frac{1}{2},\frac{1}{2}],\\ 0 & \text{elsewhere.} \end{cases}$ My f is given by $f(x) = \begin{ca...
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figure of eight- need help November 26th 2008, 11:35 AM sonia1 figure of eight- need help Hi. Does anyone know 'What is the largest figure of eight that will stand inside an equilateral triangle of side length one?' (the circles are of the same size). I have no idea how to start it http://static.thestu...
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Equilateral Triangle & Circle January 22nd 2007, 05:36 PM #1 Banned Joined Jan 2007 Posts 315 Equilateral Triangle & Circle A wire 10 meters long is to be cut into two pieces. One piece will be shaped as an equilateral triangle, and the other piece will be shaped like a circle. (a) Express the total...
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Factoring cubic polynomials November 14th 2012, 06:44 AM #1 Member Joined May 2009 Posts 109 Factoring cubic polynomials I do not understand how we know a cubic polynomial such as z^3 -3z^2 + 4z - 2 = 0 can be factored as (z - 1)(z^2 - 2z +2) = 0 I can, of course, work it backwards bu...
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Operator norm April 16th 2010, 07:13 AM notgoodatmath Operator norm I'm a bit confused about what an operator norm is. Can someone explain it to me using a simple matrix? What value would you use for the Euclidean norm (x) when it is multiplied by A? (before taking the supremum). April 16th 2010, 07:3...
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Why do Clifford algebras determine $KO$ (and $K$-)-theory? up vote 18 down vote favorite 6 In the paper "Clifford modules" by Atiyah-Bott-Shapiro, they construct a family of Clifford algebras $C_k$ over the real numbers, so that $C_k$ is the algebra associated to a negative definite form on $\mathbb{R}^k$. Let $M_k$ b...
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Re-arranging formula January 13th 2011, 03:31 AM #1 Newbie Joined Jan 2011 Posts 6 Re-arranging formula Hi, im new here. Just wondering if someone could walk me through solving this for equation for V2. I have a solution but some parts seemed to have been skipped and i dont quite understand why: 150...
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Help with diff eqn December 6th 2006, 03:44 AM ashura Help with diff eqn How can I proceed with this? solve the diff eqn: $\left (2y^2 - 4x + 5 \right )dx = \left (4 - 2y + 4xy \right )dy$ $\frac{dy}{dx} = \frac{2y^2 -4x + 5}{4 -2y + 4xy}$ Doesn't seem I can use quotient rule here. ..............?...
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Expectation of the time t standard brownian motion stopped at itself's square up vote 4 down vote favorite I have a one dimensional standard brownian motion $W$ defined under a stochastic basis with probability $\mathbf{Q}$ and filtration $\left(\mathscr{F}\right)_{t\in{\mathbf{R}}_{+}}$, and I want to calculate $\mat...
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Eigenvalues November 3rd 2007, 08:01 PM #1 Member Joined Sep 2007 From Calgary, Alberta Posts 77 Eigenvalues Find all the eigenvalues (real and complex) of the matrix: $\left( \begin{array}{ccc} -6 & 22 & 11 \\ -2 & -7 & -2 \\ -1 & 26 & 10 \end{array} \right)$ I started off by using the for...
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How to solve Diophantine equations in $F_{p}$? up vote 6 down vote favorite 5 For example, how to solve the equation $\sum^{p-1}_{i}x_{i}^{2}=0$ in $F_{p}$? This is not a homework problem. I think it should have a definite answer, so not an open problem. I just don't know how to solve it. polynomials nt.number-theory...
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alpha is a square of an element in Fq star March 16th 2011, 04:22 PM #1 Junior Member Joined Jan 2011 Posts 46 alpha is a square of an element in Fq star if q be a power of an odd prime. we need to prove that an element alpha belongs to the multiplicative group Fq star, is a square element of Fq star if ...
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Dijkstra's Algorithm Notes: • This algorithm is not presented in the same way that you'll find it in most texts because i'm ignored directed vs. undirected graphs and i'm ignoring the loop invariant that you'll see in any b...
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Surface integration October 22nd 2011, 05:51 AM #1 Junior Member Joined Mar 2011 Posts 68 Surface integration I think my method is correct here, but i must of gone wrong somewhere (note i cannot use divergence theorem) I have a vector field: $F = ax\vec{i}$ Where a is a constant and a sphere...
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Cyclic groups. Prove that <x^m> intersection <x^n> = <x^ (LCM,m,n)> November 28th 2011, 10:14 AM okoolo Cyclic groups. Prove that <x^m> intersection <x^n> = <x^ (LCM,m,n)> prove the following property of cyclic groups: Let G = <x> be a finite cyclic group. Prove that <x^m> intersection <x^n> = <x ^ LCM(m...
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Need help with an inequality October 1st 2012, 09:11 PM Halcyon Need help with an inequality Hi, could anybody please help with this inequality? I've tried it several times, but my answers are always absurd. Find a constant A for which abs(log(cos(x))+(x^2)/2) =< Ax^4 for -pi/3 <= x <= pi/3 Any help at...
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[SOLVED] Taylor Series Expansion help!!! April 27th 2010, 02:38 AM #1 Junior Member Joined Nov 2009 Posts 27 [SOLVED] Taylor Series Expansion help!!! I have to perform a Taylor Expansion in both for $S_i$ where $i=1,2,......,n$ and $t$ for the function $V(S_1,S_2,.......,t)$ I have started it, and s...
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Proof of DeMoivre's Theorem Date: 05/01/97 at 20:17:29 From: LIYA Subject: Proof of Demoivre's Theorem Dr. Math, Could you please help me prove DeMoivre's theorem by mathematical induction? I figured out the first part of the proof, but I can't prove that assuming that if it's true for n = k, then it's true for n ...
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Help with this problem please October 20th 2007, 07:15 AM #1 Newbie Joined Oct 2007 Posts 3 Help with this problem please $\\ \mbox{Give that,} \\ x_A , x_B >1 \\ \mbox{ and } \\ Y_A,Y_B\geqslant0 \mbox{ (but strictly positive for at least one)}$ $Y_A + Y_B = 100$ $P_A=Y_A(x_A -1) - Y_B$ $P_...
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Can any smooth hyperelliptic curve be embedded in a quadric surface? up vote 4 down vote favorite 4 Let's consider algebraic curves over a fixed algebraically closed field $K$. It's well known, that every smooth elliptic curve (genus $g = 1$) can be embedded in a quadric surface in $\mathbb{P}^3$. This fact follows s...
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More log stuff May 12th 2008, 01:39 AM #1 Newbie Joined May 2008 Posts 17 More log stuff 1. $\log_{2}(25^(x+3) - 1) = 2 + \log_{2}(5 ^ (x+3) + 1)$ 2. $\log_{4}(2 \cdot 3^(x) - 6) -\log_{2}(9^(x) - 6)$ 3. $\log_{4}(2 \cdot 4^(x-2) - 1) + 4 = 2x$ I attempted the first to come as far as this-: ...
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COMPUTE (ABAP Keyword) COMPUTE (ABAP Keyword) introduction & details COMPUTE Basic form COMPUTE n = arithexp. Effect Evaluates the arithmetic expression arithexp and places the result in the field n . Allows use of the four basic calculation types + , – , * and / , the whole number division operators DIV (quotient...
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Connected components of schemes over $\mathbb{F}_1$ up vote 4 down vote favorite I'm reading Deitmar's paper on Schemes over $\mathbb{F}_1$. Proposition 2.4. states that for a scheme $X$ over $\mathbb{F}_1$ there is a bijection between $X(\mathbb{F}_1)$ and the set of connected components of $X$. I don't understand th...
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Stickelberger's congruence for Gauss sums up vote 12 down vote favorite 1 We begin with (unfortunately, quite a bit of) notation necessary to state Stickelberger's congruence: Fix an integer $k>1$, and let $p$ be a prime number not dividing $k$. Let $r$ be the smallest positive integer such that $p^r\equiv 1 \pmod{k}$...
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Show that the system of equation is consistent May 3rd 2009, 10:24 PM #1 Banned Joined Dec 2008 From Mauritius Posts 523 Show that the system of equation is consistent Show that the system of equation $<br /> x - 3y -8z = -10;<br />$$<br /> 3x+y-4z=0;<br />$ and $<br /> 2x+5y+6z =13<br />$ is consist...
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Find zeros November 17th 2007, 04:24 PM #1 Super Member Joined Mar 2006 Posts 705 Thanks 2 Find zeros Show that $x^2 + 3x + 2$ has four zeros in $Z_{6}$. $x^2 + 3x + 2 = (x+2)(x+1)$, by the factor theorem, -1 and -2 are zeros of the poly. However, -2 = 4 and -1 = 5 in $Z_{6}$. But what are ...
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Infinte Sets November 21st 2009, 06:12 AM aman_cc Infinte Sets Some notations: $J_n = \{x|x \in N, 1\leq x \leq n\}$ For any two sets A,B; $A \cong B \Rightarrow$ there exists a bijection between A and B I have read following two definitions of infinite sets: 1. Set S, is finite if $S \cong J_n...
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lines through A_n reflection arrangement and permutations up vote 4 down vote favorite 2 (updated; apologies for way too much room left for interpretation in the original post) Let $\mathcal{A} =A_{n-1}$ be the $A_{n-1}$ arrangement in $\mathbb{R}^{n}$, i.e. the set of hyperplanes $H_{ij}$ specified by equations $x_i...
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Isomorphism of the function field of the projective line with $\mathbf{C}(s)$ up vote 3 down vote favorite Suppose I chose two rational functions, say, $$u = \frac{t(4+t)^5}{(1+4t)^5}, \qquad v = \frac{t^5(4+t)}{(1+4t)}.$$ Then I know that $K(X) = \mathbf{C}(u,v)$ is the function field of the projective line (Proof:...
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representability of consecutive integers by a binary quadratic form up vote 12 down vote favorite 4 I have two related questions on the representability of integers by quadratic forms in two variables : (1) Let $f: {\mathbb Z} \times {\mathbb Z} \to {\mathbb Z} $ be such a quadratic form, i.e. we have $f(x,y)=ax^2+bx...
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[SOLVED] Rearrangements of alternating harmonic series January 25th 2010, 09:34 PM tonyc4l [SOLVED] Rearrangements of alternating harmonic series Hey guys, I'm pretty stuck on the following problem. It involves rearrangements of the terms in the alternating harmonic series to produce different sums: Let s =...
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points in proof of homogeneous DE May 28th 2014, 10:58 PM #1 Member Joined Aug 2011 Posts 84 points in proof of homogeneous DE I have a question about the proof of this elementary DE, the calculations are easy $\frac{dy}{dt}+a(t)y=0\rightarrow \left | y(t)\right|=exp(-\int a(t)dt+ca)\rightarrow |cexp...
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Looking for final interest payment on a loan just paid off May 15th 2012, 06:42 PM #1 Newbie Joined May 2012 From Melfort, SK Posts 7 Hi there, It has been over 7 years since I have had to use any of my mathematics of finance knowledge and wow does it disappear when you do not use it. i have p...
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A Few Integrals February 12th 2009, 09:49 PM #1 Newbie Joined Feb 2009 Posts 7 A Few Integrals I'm stumped on these: The integral of x^3 (1+x^2)^3/2 The integral of the square root of (x^2 - 1)dx/x^3 The integral of x^3 dx/(4-x^2)^2 do a substitution, $u = 1 + x^2$ The integral o...
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Sup and inf of bounded variations December 12th 2009, 05:05 PM #1 Super Member Joined Mar 2006 Posts 705 Thanks 2 Sup and inf of bounded variations Suppose that v is a signed measure on $(X, \mathbb {M} )$ and $E \subset \mathbb {M}$ Prove that: a) $v^+(E) = sup \{ v(F) : F \in \mathbb {M} , ...
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What is the volume of a \delta-ball in the orthogonal group O(n)? Is there a (simple) lower bound? up vote 6 down vote favorite 5 The volume in the orthogonal group is measured by the Haar measure, which is the up to scaling unique measure that is invariant under the group operation. I consider the usual metric that i...
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find eqaution of a plane March 11th 2008, 06:59 PM #1 Junior Member Joined Feb 2008 Posts 29 find eqaution of a plane find the equation of the plane that goes through (1,2,-1) and making equal angles with the positive directions of the coordinate axes Hello, ramzouzy! Find the equation of the p...
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Math Forum Discussions - fERMAT'S PROOF 2^n-2 for prime n is mod n Date: Apr 11, 2013 11:22 AM Author: DRMARJOHN Subject: fERMAT'S PROOF 2^n-2 for prime n is mod n One of Fermat's few proofs is that for prime n, n divides [(2^n) -2], or n is mod n. Can this be expanded for an appropriate formula for (3^n)? Is it possi...
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Deriving a square root under a square Suppose that $f(x) = \sqrt{6+\sqrt{8x}}$. Find $f'(x).$ oh man I really need help on this one. Maybe if the numbers/expressions/surds are shown, your questions can be solved. Two red x's don't help much. Oh there they are! f(x) = sqrt[6 +sqrt(8x)] Or, f(x) = [6 +(8x)^(1/2)]^(1/2)...
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Ball At Max Height November 17th 2008, 10:23 PM #1 MHF Contributor Joined Jul 2008 From NYC Posts 1,489 Ball At Max Height Vanessa throws a tennis ball in the air. The function h( t) = –16t^2 + 45t + 7 represents the distance, in feet, that the ball is from the ground at any time t. At w...
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I have a quiz August 14th 2006, 07:43 PM Candy I have a quiz If the distance to a sound source is halved, how will the sound intensity level change? a) increase by a factor of 2 b) depends on the actual distance c) increase by a factor of 4. d) increase by 6 dB e) increase by 3 dB August 14...
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A 200 g mass attached to a horizontal spring oscillates at a frequency of 2.0 Hz. At t = 0 s, the mass is at x = 5.0... - Homework Help - eNotes.com A 200 g mass attached to a horizontal spring oscillates at a frequency of 2.0 Hz. At t = 0 s, the mass is at x = 5.0 cm and has vx = -30 cm/s. Determine the k. We know th...
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ervi Overview of the RegularChains[ConstructibleSetTools] Subpackage Calling Sequence RegularChains[ConstructibleSetTools][command](arguments) command(arguments) Description • The RegularChains[ConstructibleSetTools] subpackage is a collection of commands for manipulating these two types of algebraic objec...
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What is the limit of the sequence an=(n^2-n+7)/(2n^3+n^2) ?n tends to infinite - Homework Help - eNotes.com What is the limit of the sequence an=(n^2-n+7)/(2n^3+n^2) ? n tends to infinite We'll force the factor n^2 to numerator and we'll get: lim an = lim n^2*(1 - 1/n + 7/n^2)/(2n^3+n^2) We'll force the factor n^3 ...
5
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Infinitely uniform line charge April 7th 2009, 06:27 AM august Infinitely uniform line charge Hi all, In fact, this is a classical integral, whose answer is always given without showing the steps, in electromagnetism. In Cylindrical coordinates $<br /> \int_{+\infty}^{-\infty} \! \frac{\rho r \hsp...
5
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Trivial canonical bundle of a Ricci-flat, simplyconnected Kähler manifold up vote 3 down vote favorite 1 Hallo, I have two questions where I do not really know how to deal with them. Let $(M,J,g)$ be a Kähler manifold, where $g$ is the Riemannian metric and denote by $\omega(\cdot , \cdot) = g(J \cdot , \cdot) $ the ...
5
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Math Forum Discussions Math Forum Ask Dr. Math Discussions Internet Newsletter MathTools Teacher2Teacher Teacher Exchange Workshops Search All of the Math Forum: Views expressed in these public forums are not endorsed by Drexel University or The Math Forum. Topic: The integration test suites for Sage. Replies: 14 ...
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product rule in norm space November 17th 2012, 05:28 AM #1 Junior Member Joined Oct 2012 From uk Posts 41 product rule in norm space the product rule fn->f , gn->g implies fngn->fg true in the normed vector space (C[0,1],||.||) depends on the the norm||.||. Give a proof or a counterexample fo...
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Differentials Hi guys! I ve got this very difficult exercise for my uni. Could someone please help? Thank you in advance. http://img2.immage.de/200270494rszexercise2.jpg Thanks for looking into my problem Prove It. I have inserted a picture of the exercise but it seems that you could not see it. I have now uploaded it...
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Series Solution of PDE Non-Homogeneous BCS August 2nd 2010, 09:55 AM lvleph Series Solution of PDE Non-Homogeneous BCS I thought I had these problems down, but I found one for which I am having trouble. $u_t = u_{xx} - u,\quad 0<x<\pi,\; t>0$ $u_x(0,t) = 1,\; u_x(\pi,t) = -1,\; t>0$ $u(x,0) = 0,\;...
5
[ -0.1376953125, 0.006591796875, 0.08251953125, 0.0218505859375, -0.0157470703125, 0.06640625, 0.0101318359375, -0.03173828125, 0.0028839111328125, -0.047607421875, 0.01104736328125, -0.06884765625, -0.03173828125, -0.05322265625, -0.0296630859375, -0.0223388671875, -0.0037078857421875...
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Please Help: find the area of the region March 18th 2008, 11:29 AM waite3 Please Help: find the area of the region Sketch the region enclosed by the given curves. Decide whether to integrate with respect to x or y. Then find the area of the region. y=6cos(x), y=(2sec(x))^2, x=-pi/4, x=pi/4 I keep getti...
5
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Finding y-intercepts Date: 6/12/96 at 19:2:1 From: Ourpond Subject: Linear Equations Dear Dr. Math: I'm having a problem with finding y-intercepts. How do you know what the y-intercept is for the following equations? 2x + y = 3 or x - 4y + 8 = 0 I'm also having trouble with this: Draw the graph of each line: x-in...
4
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Supplier Order Allocation Order allocation issues among multiple suppliers in B2B E-market places Jishnu Hazra (hazra@iimb.ernet.in) B. Mahadevan (mahadev@iimb.ernet.in) Sudhi Seshadri (seshadri@iim...
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Version of Lights-Out Puzzle Using Buttons Date: 09/02/2004 at 12:04:32 From: James Subject: Puzzle algebra You have 36 buttons placed in a 6x6 grid. Each button can be either visible or invisible. The difference between a visible and an invisible button is that you cannot press an invisible button. When you press...
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Math Forum Discussions Math Forum Ask Dr. Math Discussions Internet Newsletter MathTools Teacher2Teacher Teacher Exchange Workshops Search All of the Math Forum: Views expressed in these public forums are not endorsed by Drexel University or The Math Forum. Topic: Actuarial: An Introduction to Mortality Replies: 1...
4
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Compound Probabilities Date: 6/28/96 at 21:6:53 From: Johnny Vogler Subject: Compound probabilities Dear Dr. Math, I want to learn how to find the probability of various values of an expression that is a linear combination of random numbers with uniform probability density within a certain range, say zero to one. ...
5
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nontrivial cube root of unity up vote 0 down vote favorite Hi, I have a finite field Fp with p = 11 mod(12) and I am trying to get the third nontrivial root of unity in Fp^2 = Fp^2[x]/(x^2+1). So, i need x where x^3=1. Somehow I came into a source saying that it would be: (p-1)/2 + (3^((p+1)/4)) mod(p))*i where i^2=...
4
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Relations question February 16th 2009, 06:14 PM #1 Newbie Joined Jan 2009 Posts 21 Relations question My textbook does an erratic job of presenting relations to the reader, my professor is of no help, and I'm thoroughly puzzled, particularly with this question. For each of the following relations de...
4
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Vector / Scalar Projection April 3rd 2009, 08:59 PM Russ Vector / Scalar Projection This question has me majorly confused. I've been going quite well so far at Calculus (that's the name of the subject) but this question has me completely stumped. Complete answers aren't necessary since I want to get this don...
4
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Different notions of associated prime (in the non Noetherian case) up vote 7 down vote favorite 2 Most books I have treat primary decomposition only in the Noetherian case. Atyiah-MacDonald goes a step further and prover the uniqueness theorems of primary decomposition without the Noetherian hypothesis. But it seems t...
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Indices Algebra July 17th 2012, 03:59 AM #1 Newbie Joined Jul 2012 From Earth Posts 3 Indices Algebra I have two questions that needs to be solved with algebra, please help, i figured out the answers to be -4 for the first and -1 for the second but i dont know the steps solving it with algebra. ...
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Bayesian Variable Transformation (solve for PDF) September 15th 2011, 03:03 PM Dwaffle Bayesian Variable Transformation (solve for PDF) Hi I'm struggling with where to start for this variable transformation problem. X~Bin(N,p) so that p(X=x) = (N choose x) * (p^x) * (1-p)^(N-x) Use a uniform prior p(p)...
4
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PD3 groups and PD4 complexes up vote 5 down vote favorite 1 I am interested at the moment in what groups can occur as the fundamental group of a 4-manifold (or more generally, a 4-dimensional CW complex) with prescribed conditions on the intersection form. I have what I am hoping is a basic homotopy theory question: ...
5
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Simplifying using trig identities June 3rd 2010, 07:37 AM #1 Junior Member Joined Nov 2008 Posts 62 Simplifying using trig identities Simplify: $\cot(-x) (\cos x) (\tan^2 x + 1)$ I'll show you what I have so far. My problem is I don't really know when I'm finished. $\cot(-x) (\cos x) (\tan^2 x ...
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Help! Test tomorrow. December 2nd 2008, 12:42 PM #1 Newbie Joined Sep 2008 Posts 10 Help! Test tomorrow. i have a test tomorrow and i need help with some of the questions on the review. i have like 5 of them. here is the first one. Find the derivative of the function y=xTanh^-1(lnx) You need to...
5
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convergence test May 13th 2011, 07:28 AM #1 Member Joined Nov 2010 Posts 94 convergence test I have question which to show that sum(1/n)log[1+(1/n)] is convergent. I don't think i can use integral or ratio or raabe's test. I am guessing I have to use limit comparison test ??? Help me ! I haven't lea...
5
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First-order nonlinear DE November 25th 2010, 05:26 AM #1 First-order nonlinear DE Hello, I tried searching similar DE-problems, but I couldn't find one. The problem is following differential equation: $e^{x}y'+xe^{-y}=0$ So, it seems to be first-order nonlinear DE. But, I don't know how to solve it. ...
5
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orsion General Relativity Tutorial - Torsion John Baez Oz asks: "Why do we assume [the connection] in GR is torsion free? A short couple of non-sarcastic information-rich understandable sentences would suffice. Enough to place it in a footnote of the brain." Non-sarcastic, eh? You must think I'm really mean and nast...
4
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sums and differences of angles February 20th 2010, 03:47 PM #1 Junior Member Joined Sep 2009 Posts 40 sums and differences of angles If the angles A, B of triangle ABC are such that $cos A = {-4/5}$ and $cos B = {12/13}$, find without using tables the value of Cos C' Thanks. $C = \pi - A - B$ ...
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Is there a good metric under which a sequence of compact sets can converge to an infinite dimensional set? up vote 3 down vote favorite I have a sequence of finite-dimensional, compact sets in $L^2(\Omega)$, where $\Omega\subset \mathbf{R}^2$ is closed and bounded. The dimension grows monotonically with the sequence, ...
4
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Linear Damping Model June 13th 2008, 02:53 AM moolimanj Linear Damping Model Hi all. I have got the following question regarding a seismograph and what I would like to do is to express the forces acting on the particle in terms of the given variables and parameters and the unit vector i. Can some one pl...
4
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Help with question on matrices April 11th 2012, 12:19 AM #1 Newbie Joined Apr 2012 From Texas Posts 2 Help with question on matrices Hello My daughter is doing a college assignment and I managed to help her with the majority of the question but cannot figure out the last part. I have the cha...
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[ -0.00616455078125, 0.0849609375, 0.034423828125, 0.11376953125, -0.040283203125, -0.02734375, 0.01251220703125, 0.01263427734375, -0.0162353515625, -0.0211181640625, 0.1376953125, -0.057373046875, 0.0869140625, 0.016357421875, -0.0242919921875, 0.08837890625, -0.0213623046875, 0.01...
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analysis - continuous functions April 26th 2008, 03:26 AM #1 Member Joined Jan 2008 Posts 114 analysis - continuous functions Just going through past papers as my anaysis exam is on Weds, but I'm quite stuck/unsure about 2 questions I've come across... If g:[0,1] ---> [0,1] is a continuous function...
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[ -0.04052734375, -0.01202392578125, 0.06103515625, 0.0263671875, -0.0478515625, 0.02197265625, 0.11572265625, 0.006866455078125, -0.041259765625, -0.03515625, -0.06494140625, -0.010986328125, 0.051513671875, 0.041259765625, -0.04931640625, -0.035888671875, 0.01904296875, -0.04003906...
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of An Exploration of Physics by Dimensional Analysis The diversity of dimensions of physical quantities and their consequences on how the behaviors of physical systems are shaped, plays an essential role throughout all physics theories. This is somehow well-known in principle since long ago. However the explanatory ...
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[ -0.0206298828125, 0.0098876953125, 0.046630859375, 0.0859375, -0.017822265625, 0.009765625, -0.0771484375, 0.018798828125, 0.06103515625, -0.007781982421875, 0.0155029296875, -0.0291748046875, -0.046630859375, 0.07763671875, -0.003936767578125, -0.03173828125, -0.01031494140625, 0....
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