# Integrate e^(-r^2)

1. May 23, 2007

### Zurtex

Last edited: May 23, 2007
2. May 24, 2007

### 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.

3. May 29, 2007

### Zurtex

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

4. May 29, 2007

### uart

5. May 29, 2007

### theperthvan

how about integrating it wrt x. Easy!