Simplify and FullSimplify

*To*: mathgroup at smc.vnet.net*Subject*: [mg58547] Simplify and FullSimplify*From*: "fizzy" <fizzycist at knology.net>*Date*: Wed, 6 Jul 2005 03:11:38 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

A result of a calculation I was doing generated this expression.... q-q Exp[-a x] + c Exp[-a x] naturally my next step was Simplify and I thought I'd get the Exp[- ax] collected.....to my complete surprize I got the following: Exp[-a x] (c + (-1+ Exp[a x]) q How on Earth did Mathematica come up with this? I checked FullSimplify which did collect Exp[-a x].... On re-reading my question before I submitted it, I see that with Simplify Mathematica 'collected' using Exp[- a x] q.....of course, visually this expression seems quite complex and would seem to take much more 'thinking' to get ......why do Simplify and FullSimplify have such a vast difference in what is considered 'Simpler'? Thanks....Jerry Blimbaum

**Follow-Ups**:**Re: Simplify and FullSimplify***From:*Andrzej Kozlowski <akozlowski@gmail.com>