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MathGroup Archive 1996

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Re: Replacement

  • To: mathgroup at
  • Subject: [mg4471] Re: Replacement
  • From: Stephen P Luttrell <luttrell at>
  • Date: Mon, 29 Jul 1996 02:37:24 -0400
  • Organization: Defence Research Agency, Malvern
  • Sender: owner-wri-mathgroup at

Sergej Gerassimov wrote:
> Hi,
> I have something like
> x/Sqrt[a^2+b^2]+Sqrt[a^2+b^2]/y
> How to replace Sqrt[a^2+b^2] by r everywhere in the expression?

Try this, for example:

Sqrt[a^2+b^2] := r;

Dr Stephen P Luttrell                  luttrell at
Adaptive Systems Theory                01684-894046 (phone)
Room EX21, Defence Research Agency     01684-894384 (fax)           
Malvern, Worcs, WR14 3PS, U.K.


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