Re: Incorrect integral in Mathematica
- To: mathgroup at smc.vnet.net
- Subject: [mg91382] Re: [mg91362] Incorrect integral in Mathematica
- From: Bob Hanlon <hanlonr at cox.net>
- Date: Tue, 19 Aug 2008 07:15:23 -0400 (EDT)
- Reply-to: hanlonr at cox.net
This has been fixed.
$Version
6.0 for Mac OS X x86 (64-bit) (May 21, 2008)
Integrate[
Exp[-x^2/(2 w^2)] Exp[-(y - y0)^2/(2 z^2)],
{x, -Infinity, Infinity},
{y, -Infinity, Infinity},
Assumptions -> {w > 0, z > 0}]
2*Pi*w*z
Bob Hanlon
---- Eran Mukamel <emukamel at stanford.edu> wrote:
=============
Hi All,
I'm getting a nonsensical answer of 0 for the following integral in Mathematica 5.0 (Mac OSX):
Integrate[Exp[-x^2/(2w^2)]Exp[-(y - y0)^2/(2z^2)],
{x, -Infinity, Infinity}, {y, -Infinity, Infinity}]
The result should be (2 Pi w z). Any ideas why this fails?
Thanks in advance, Eran