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Re: Replacement
*To*: mathgroup at smc.vnet.net
*Subject*: [mg4477] Re: Replacement
*From*: rubin at msu.edu (Paul A. Rubin)
*Date*: Mon, 29 Jul 1996 02:37:29 -0400
*Organization*: Michigan State University
*Sender*: owner-wri-mathgroup at wolfram.com
In article <4shud7$g7n at ralph.vnet.net>,
ges at vsnhdd.cern.ch (Sergej Gerassimov) wrote:
->Hi,
->
->I have something like
->
->x/Sqrt[a^2+b^2]+Sqrt[a^2+b^2]/y
->
->and I'd like to substitute Sqrt[a^2+b^2] by r.
->
->x/Sqrt[a^2+b^2]+Sqrt[a^2+b^2]/y //. Sqrt[a^2+b^2]->r
->gives:
->
-> x r
->------------- + -
->Sqrt[a^2+b^2] y
->
->(replace one only in the numerator)
->How to replace Sqrt[a^2+b^2] by r everywhere in the expression?
->
->Thanks.
-> S.
In[]:= x/Sqrt[a^2+b^2]+Sqrt[a^2+b^2]/y //.
(a^2+b^2)^Rational[ n_, 2 ] -> r^n
Out[]= x r
- + -
r y
Paul
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* Paul A. Rubin Phone: (517) 432-3509 *
* Department of Management Fax: (517) 432-1111 *
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they translate it into their own language, and at once it is something
entirely different. J. W. v. GOETHE
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