help! - questions about Integration

*To*: mathgroup at smc.vnet.net*Subject*: [mg28833] help! - questions about Integration*From*: <c6wang at sciborg.uwaterloo.ca>*Date*: Tue, 15 May 2001 00:59:04 -0400 (EDT)*Organization*: University of Waterloo*Sender*: owner-wri-mathgroup at wolfram.com

Hello! I am quite new about Mathematica, can someone help me out this question? I want to do an integration, as written below: Integrate[Exp[-(x/a)^2-(y/b)^2], x and y are variables (-Infinity, Infinity), integration area is defined by A < (x^2+y^2)/(x^2 Y^2 x^2-y^2) < B, Where a, b, A, B are invariables. I am wondering if Mathematica can find out a way to to this. Or there is a function from Mathematica special for this kind of integration? Thank you in advance! Regards Connie