symbolic calculations with complex numbers

*To*: mathgroup at smc.vnet.net*Subject*: [mg31937] symbolic calculations with complex numbers*From*: "Roberto Dinapoli" <dinapoli at usa.net>*Date*: Thu, 13 Dec 2001 01:08:41 -0500 (EST)*Organization*: CERN - European Laboratory for Particle Physics*Sender*: owner-wri-mathgroup at wolfram.com

Hello, I've a problem: is there a way to convince mathematica to do symbolic calculations and simplifications taking all symbolic variables as real? example: Abs[p+ I q] is not evaluated, I'd like to see : sqrt[ sqr[p]+sqr[q] ]... for all the calculations I have to do it's really important. Thanks a lot Roberto