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## Integrate e^(-r^2)

Nevermind sorry, think I've found a sufficent article on wikipedia to help me:

http://en.wikipedia.org/wiki/Gaussian_integral
 Recognitions: Homework Help From memory the Gaussian integral is from infinity to negative infinity..if you want something that act's as an anti derivative, try the Error Function ( erf(x) ) EDIT: ~sigh~ I just realised the erf(x) also has bounds, my bad.

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 Quote by Gib Z From memory the Gaussian integral is from infinity to negative infinity..if you want something that act's as an anti derivative, try the Error Function ( erf(x) ) EDIT: ~sigh~ I just realised the erf(x) also has bounds, my bad.
Thanks, the problem was actually in response to a house mate on a physics course who had this integral and was utterly perplexed how one would integrate it from negative to positive infinity. I remembered it was a standard integral but forgot the details how to do it, anyway in the end it turned out he was integrating over the wrong co-ordinates anyway and it was much more simple once he transformed the integral.

But thanks for trying

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