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