Substitute all known relations in result

*To*: mathgroup at smc.vnet.net*Subject*: [mg86614] Substitute all known relations in result*From*: "Dr. Johannes Zellner" <johannes.zellner at gmail.com>*Date*: Sat, 15 Mar 2008 03:09:26 -0500 (EST)

Hi, How do I make mathematica to display results with all known relations / variables? E.g. if a result is x^2+y^2 and before I'd defined r = x^2+y^2 I'd like mathematica to display the result rather as "r". And: I'd like mathematica to do this for each relation defined before w/o specifying every possible replacement. Any help much appreciated.

**Follow-Ups**:**Re: Substitute all known relations in result***From:*Andrzej Kozlowski <akoz@mimuw.edu.pl>