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seen Sep 2 '13 at 3:01

Jul
5
suggested suggested edit on Solve inhomogeneous wave equation
Jul
5
revised Find a single-valued analytic branch of $\sqrt{z^2-1}$ in $\mathbb{C} \backslash [-1,1]$.
fixed format
Jul
5
suggested suggested edit on Find a single-valued analytic branch of $\sqrt{z^2-1}$ in $\mathbb{C} \backslash [-1,1]$.
Jul
5
comment Evaluating $\int\limits_{-\infty}^\infty {\exp(iax)\over1+ix}dx$
This looks like the Fourier Transform.
Jul
5
revised Differentiation under the integral sign.
improved formatting.
Jul
5
suggested suggested edit on Differentiation under the integral sign.
Jun
30
revised Gauss-Hermite quadrature of $\cos(x)$ over infinity
Improved Formatting
Jun
30
suggested suggested edit on Gauss-Hermite quadrature of $\cos(x)$ over infinity
Jun
30
comment How to find the eccentricity of this conic?
What level are you asking this question from,... is this a pre-calculus course? Just so the responses and terminology would be more appropriate for your level. If so, you might want to tag your question with pre-calculus or the related as well.
Jun
30
comment Laplace transform of $1/t$
Or more simply: $t^n \stackrel{\mathcal{L}}{\Longleftrightarrow} \frac{n!}{s^{n+1}}$ without involving the gamma ($\:\Gamma\:$) function.
Jun
28
comment Evaluation of these integrals
@draks: Of course not :D, using a CAS. Is it possible to get polylog function by hand or recognize it from doing intergrals? I just thought this was a CAS algorithmic way of deducing the problem into a more complex answer using special functions, because an elementary table look up failed. So it resorted to special solution techniques. Although $\tan k$ is considered a simple function but not sure about hyperbolic tangent :)
Jun
28
comment Evaluation of these integrals
I get this for integral one: Not sure if equivalent to Norbet answers. $\int_0^p \! ktanh(\pi k)=-(1/24)(-\pi^2+12p^2\pi^2-24p\ln(1+exp(2p\pi))\pi-12polylog(2,-exp(2p\pi)))/(‌​\pi^2)$
Jun
28
comment Solving a complex integral
Similar type of question from a $\mathbb{R}$ domain standpoint. math.stackexchange.com/questions/73250/…
Jun
28
comment Fundamental solution of the wave operator
Have a look here for starts: math.ucsd.edu/~lindblad/110b/l17.pdf math.ucsd.edu/~lindblad/110b/l18.pdf
Jun
8
awarded  Constituent
Jun
8
awarded  Caucus
Apr
29
accepted Definition of Sinc function
Apr
29
comment Definition of Sinc function
Very nice answer. :)
Apr
19
comment Definition of Sinc function
@J.M.: I guess it was really not needed to state both. I could of just stated the one of preference (or of matter here). But I just included for others who may be only familiar with one definition over the other.
Apr
19
comment Definition of Sinc function
@J.M.: Please see here: en.wikipedia.org/wiki/Sinc_function