# Integrate e^(-r^2)

Homework Helper
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Homework Helper
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 realized the erf(x) also has bounds, my bad.

Homework Helper
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 realized 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

theperthvan
how about integrating it wrt x. Easy!