# Calculus

- Elementary functions. Calculating limits, derivatives and integrals. Optimization problems
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 Meta Thread / Thread Starter Last Post Replies Views Please post any and all homework or other textbook-style problems in one of the Homework & Coursework Questions... Feb23-13 09:24 AM micromass 1 40,051 hi, i was readin through a text book on electrodynamics and this integral has stumped me - can someone please tell me... Apr21-10 10:16 AM elect_eng 5 1,104 I'm studying for a test. How do I find the flux of the vector field F = (1,1,1) down through the surface \sigma,... Apr21-10 02:46 AM squenshl 8 1,537 Another question of a practice test. How do I use the Divergence theorem to find the outward flux of the field F =... Apr21-10 01:14 AM squenshl 2 806 hello, i am under the impression that the take-it-or-leave-it ("buy it now") price that maximizes expected revenue... Apr20-10 02:36 PM citrusvanilla 1 794 Let \{h_n\} be ANY sequence of real numbers such that h_n \neq 0 and h_n \to 0. If f'(x) exists, do we have f'(x)... Apr20-10 09:00 AM HallsofIvy 4 892 I am confuse with this: Let\;\; t=jx \;\;,\;\; j =\sqrt{-1} \Rightarrow \frac{dt}{dx}=j But if I use... Apr20-10 01:52 AM yungman 2 921 Here is another approach to finding the volume : Let x_{1} be a point in such that : f(x_{1}) = minimum value... Apr19-10 07:13 PM evagelos 0 668 In doing math I try not to memorize shortcuts/simplifications, but instead understand what's happening. When studying... Apr19-10 02:06 PM phys-lexic 3 1,123 I want to show x->abs(x) is not differentiable at 0 Some techniques in analysis are required.... how should i do? Apr19-10 08:25 AM Landau 3 856 sorry Apr19-10 02:04 AM phys-lexic 1 820 I don't understand how to set up the washer and shell equations. When you are given the function and the line to... Apr19-10 02:02 AM phys-lexic 5 42,764 I was looking up how pi was derived, and found this: http://mathforum.org/library/drmath/view/52589.html ... Apr18-10 09:37 PM Werg22 1 9,585 Hello everyone, This might be a bit of a silly question. Just looking at the definition of a gradient of a scalar... Apr18-10 04:13 AM pamparana 2 847 The definition of entire function in complex analysis is 'If a complex function is analytic at all finite points of... Apr17-10 10:11 PM emptyboat 3 996 In Dodelson's cosmology book it is claimed that "For large x, J_0(x\theta)\rightarrow P_{x}(cos\theta)". Does... Apr17-10 07:57 PM nicksauce 1 644 Hello I've been told that a (real) Lipschitz function (|f(x)-f(y)| (2x+1,4x) ,find sup{||f(x)||_{E} :xε(0,1)} where "E" is for Euclidean norm Apr16-10 09:20 AM evagelos 10 1,124 One of the basic vector identities is \nabla \cdot (\nabla f \times \nabla g) = 0 Is this true if f and g are... Apr16-10 06:55 AM phyzguy 1 799 why sometime we need to reverse the order of integration? and how to determine the new limit? for example: for... Apr15-10 08:53 PM LCKurtz 3 2,046 Calculate the summation of i=1 to inf of the summation of j=i to inf of p^(j+i). Yes, it is the summation of a... Apr15-10 03:27 PM mathman 1 983 what does the ^ symbol mean in stochastic calculus? e.g. for the first passage time \tau, we may write k^\tau what... Apr15-10 01:10 PM tennishaha 0 756 When I plug in this "{x,0,0}/|x|^3", here: http://www.wolframalpha.com/ ...it plots some range for x=-1 to x=+1,... Apr15-10 11:10 AM N_F 4 854 what is the different between line integral and surface integral? If we parameterize curve by x=t , y=t , what is the... Apr15-10 09:18 AM nothGing 6 872 http://arxiv.org/abs/0812.3356 http://arxiv.org/abs/1004.2062 Apr15-10 06:59 AM sEsposito 1 1,408 Hi, everyone! I have a problem in understading the change of variables in double integrals. Here is an example... Apr15-10 05:02 AM HallsofIvy 9 5,882 Online integrator: http://www.wolframalpha.com/ \int \int (x,y,z) \times (x,y,z) \times (x,y,z) \int_{L1}... Apr15-10 12:53 AM N_F 2 6,143 I've heard that there are some types of functions that are impossible to integrate. Can I see an example and why so? ... Apr15-10 12:35 AM shree007 18 4,895 Does Stokes's theorem imply that the flux integral of a curl of a vector field over a closed surface is always zero?... Apr14-10 08:35 PM LCKurtz 1 1,248 "Let fk be functions defined on Rn converging uniformly to a function f. IF each fk is bounded, say by Ak, THEN f is... Apr14-10 03:52 PM mathman 7 1,634 Please delete. Erroneous post. Apr14-10 07:44 AM MASH4077 0 558 "Let (V,||.||) be a normed vector space. Then by the triangle inequality, the function f(x)=||x|| is a Lipschitz... Apr14-10 07:42 AM evagelos 7 1,336 Hello, How to prove this equality: N\,\overline{\gamma}\sum_{k=0}^{N-1}(-1)^k\frac{{N-1\choose... Apr14-10 03:19 AM S_David 2 824 how can we prove that lun x is continuous over (0, \infty )? Provided that we define : lun x =y <=> e^y =x? Apr13-10 04:56 PM mathman 3 828 Someone told me that a continuous function that is Lipschitz is differentiable almost every where. If this is true how... Apr13-10 01:49 PM VeeEight 1 640 I once wanted to find the nth order Fourier approximation for f(x)=x. Since this function is odd, the projections on... Apr13-10 01:30 PM LCKurtz 1 588 For a graph of any function, one of following conditions is said to exist so as for it to be symmetric: a graph is... Apr13-10 12:55 PM Danish_Khatri 2 1,476 Hello. I'm new to vector calculus and I had a question about the following integral: \int_{C} x dy please note that... Apr13-10 10:56 AM nonequilibrium 2 626 Firstly, I want to note I'm a post college student who is attempting to teach himself calculus. I'm reading Calculus... Apr13-10 08:23 AM brennon80 4 1,400 My question is about the coefficients of a complex laurent series. As far as I know, there are three kinds of series:... Apr13-10 07:21 AM Urmi Roy 12 4,239 Near what points (x,y,z) does e^{yz}-x^2 zln{y}=\pi have a solution for y in terms of x and z Apr13-10 05:26 AM Eynstone 1 973

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