What is MakeRules (Option of Solve) good for?

*To*: mathgroup at smc.vnet.net*Subject*: [mg28483] What is MakeRules (Option of Solve) good for?*From*: Adalbert Hanssen <hanssen at zeiss.de>*Date*: Sun, 22 Apr 2001 01:30:15 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

Hi, MathGroup, looking for a way to find out about the substitutions, that were carried out during Solve, I found out that Solve has an option MakeRules, which defaults to False. I could not find anything on it, neither in THE BOOK nor in the online-help. Is anyone out there, who has used MakeRules? Has anyone found out a practical way to see the substitutions, that were made during Solve, e.g. when solving Solve[-(d*x) + (x + xx)*Sqrt[(-1 + n^2)*x^2 + n^2*z^2]==0,x] which yields a long solution set with over and over the same complicated subexpressions (probably from writing out some substitutions done during the Solve-Process). kind regards Dipl.-Math. Adalbert Hanszen

**Follow-Ups**:**Re: What is MakeRules (Option of Solve) good for?***From:*Daniel Lichtblau <danl@wolfram.com>