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seen Sep 2 '13 at 3:01

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
Apr
19
comment Definition of Sinc function
@J.M.: What do you mean by using one name for two different functions? I'm more so used to the normalized form.
Apr
19
asked Definition of Sinc function
Mar
25
comment Integral Transform
@Mathlover: where does the $e^t$ go, that's on the outside of the integral on the RHS of the equation?
Mar
24
comment Integral Transform
@Tpofofn: Thanks, I realized that. But I need the function $w(t)$ to determine the output to another system with $w(t)$ being the input. This is why I needed to integrate or use properties to transform $W(f) \leftrightarrow w(t)$.
Mar
23
comment Integral Transform
@Mathlover: Ah hah, I knew that integral looked familiar. I do not have a book handy, but is this a transform pair I believe or property? I just remember seeing it sometime ago, but haven't used it before. Which now makes more sense in terms of what functional constructs that has infinite amplitude, such as the dirac. Thank You!
Mar
23
comment Integral Transform
@Mathlover: I didn't get what you meant by that. It would be in terms of $f$ correct because its indefinite and its whats the independent variable is for that case, right? So would our $w(t) = e^t\int_{-\infty}^{\infty} j\pi f e^{j2\pi ft} df$?