
Re: integral for fun
Posted:
Feb 28, 2014 10:25 AM


Le 28/02/2014 15:32, Jonas Matuzas a écrit : > I wrote integral in Mathematica: > Integrate[Cos[x]^4/(1 + x^8), {x, \[Infinity], \[Infinity]}] > > for fun,( for speed compassion between win7 and Linux (actual I found that in Linux 4x faster with more simple integrals )) > and... This integral is still calculating, it is already passed 1.5 day , I am getting curios ... I am gonna to leave it for weekend in work place . My computer is almost front end (i7 4770, 16 GB RAM), integral is running on Linux. > I am a bit lazy but I think this integral can by taken with pencil and paper using residual theory. > I find publication is talking about similar problem , and writing that in this case residual theory is not complete..: > http://www.csm.ornl.gov/~bowman/fjts312.pdf > > What do you think  is it connected with so long calculation time. > Do you have some thoughts about this case? > I am just curios :) >
Try NIntegrate and you will have the answer in less than a second.

