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RE: Eliminating common factors?

  • To: mathgroup at
  • Subject: [mg93349] RE: [mg93299] Eliminating common factors?
  • From: "Richard Hofler" <rhofler at>
  • Date: Tue, 4 Nov 2008 06:20:20 -0500 (EST)
  • References: <>

Does this give you what you want?

In[23]:= exprsimpl = 4Factor[(a/4 + b/(4 c))]//Simplify

Out[23]= a+(b/c)

Richard Hofler

-----Original Message-----
From: AES [mailto:siegman at]
Sent: Monday, November 03, 2008 5:27 AM
To: mathgroup at
Subject: [mg93349] [mg93299] Eliminating common factors?

I have a simple, totally algebraic symbolic calculation that displays
its output in the form (rewritten here using TeX notation)

      4 ( {a \over 4 } + { b \over 4 c } )

where a, b and c are fairly simple products of purely algebraic
quantities; \over is the TeX notation for a display fraction; and the
curly brackets are just for TeX purposes and are not there in the actual


Is there any Assumption for Simplify, or any other _simple_ way, to get
rid of those (utterly!!!) superfluous 4's?

[I suppose the real question is, why doesn't M cancel 'em the hell out
in the first place?!?!]

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