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MathGroup Archive 2005

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Is Apart[ .. ] the correct way for denominator splitting?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg58527] Is Apart[ .. ] the correct way for denominator splitting?
  • From: Jos Bergervoet <Jos.MyName at Philips.com>
  • Date: Wed, 6 Jul 2005 03:11:13 -0400 (EDT)
  • Organization: Philips Research Eindhoven
  • Sender: owner-wri-mathgroup at wolfram.com

When I ask for:  Apart[2/(x^2-1), x]  I nicely get:

    1/(x-1)  -  1/(x+1)

But unfortunately  Apart[2/(2x^2-1), x]  does not give the same
splitting of the denominator ( it just gives back 2/(2x^2-1) ).

What is the correct way to see the denominator splitting with all
terms first order (as one would use for integration, etc.)

I found Andrzej Kozlowski's answer in message
   http://groups-beta.google.com/group/sci.math/msg/4c9741832668c3b7
from 2001, but I was wondering whether in the mean time a built-in
function might have been added?

-- Jos


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