defining variables as Real

*To*: mathgroup at smc.vnet.net*Subject*: [mg52778] defining variables as Real*From*: "symbio" <symbio at has.com>*Date*: Mon, 13 Dec 2004 04:22:25 -0500 (EST)*Reply-to*: "symbio" <symbio at sha.com>*Sender*: owner-wri-mathgroup at wolfram.com

Is there anyway in Mathematica to define a variable as say Real or Imaginary or greater than zero, etc.. in the very beginning of all calculations and keep it that way throughout, instead of having to use simplify with assumptions each time?

**Follow-Ups**:**Re: defining variables as Real***From:*Andrzej Kozlowski <akoz@mimuw.edu.pl>