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Simplify using custom function

• To: mathgroup at smc.vnet.net
• Subject: [mg47676] Simplify using custom function
• From: Jens <jens at tnntw10.tn.tudelft.nl>
• Date: Wed, 21 Apr 2004 05:23:20 -0400 (EDT)
• Sender: owner-wri-mathgroup at wolfram.com

What I'm trying to achieve is to find a certain function in a more
complicated expression:

example:    complicated expression: -1+2 x +2 e^x
	    function: f[x_]=x+e^x

	    Mathematica should return: -1+2 f[x]

I've been looking at TransformationFunctions and FullSimplify, but did
not succeed in defining a transformation function so far. How do I do
that? (It's Mathematica 5.0)

Jens

• Follow-Ups:
  • Re: Simplify using custom function
    • From: Andrzej Kozlowski <akoz@mimuw.edu.pl>