Replacement question

*To*: mathgroup at smc.vnet.net*Subject*: [mg74156] Replacement question*From*: Brian Beckage <Brian.Beckage at uvm.edu>*Date*: Tue, 13 Mar 2007 03:34:35 -0500 (EST)

I apologize for this very basic question. I understand how to use /. {} to replace a variable with a more complex expression, e.g., x-> y+z. Can one move in the opposite direction to replace all occurrences of y+z with x? myExpression/.{y+z->x} does not seem to work. Thank you for your help, Brian -- ********************************************************************* Brian Beckage Department of Plant Biology University of Vermont Marsh Life Science Building Burlington, VT 05405 *********************************************************************