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Re: Integrating exp(x^2)
Posted:
Dec 24, 2010 2:13 AM


In article <MPG.277e0c0ad87b8ddc98c961@news.individual.net>, Stan Brown <the_stan_brown@fastmail.fm> wrote:
> This came up at work yesterday, and neither of us could remember how > to do it. I pulled out my copy of Thomas and couldn't find it, > though I did find a statement at the beginning of the "Methods of > Integration" chapter that it would be dealt with later and would > involve infinite series. > > Can someone remind me, or point me toward an online reference? > Thanks! > > P.S. We actually want the definite integral from x=0 to infinity. > > And again, it's not the answer but the method that we're looking for.
<http://www.wolframalpha.com/input/?i=integrate+e^x^2> gives an answer but not much of a method.
<http://mathforum.org/library/drmath/view/69832.html> gives a derivation (which I have not read) and an answer.
The two answers do not agree  I think (but am not sure) that Wolfram is correct.
 Paul Sperry Columbia, SC (USA)



