Re: Algebraic substitutions. HOW?
- To: mathgroup at smc.vnet.net
- Subject: [mg17697] Re: [mg17646] Algebraic substitutions. HOW?
- From: BobHanlon at aol.com
- Date: Fri, 21 May 1999 23:59:08 -0400
- Sender: owner-wri-mathgroup at wolfram.com
In a message dated 5/21/99 1:38:06 PM, alessio at mail.cern.ch writes: >say I have an expression like (a^2)/(b^2) and I want to change it by >introducing c:=a/b in order to obtain c^2. > >Euivalent exaple: h^3/t^2 -> (z:=h^2/t^2) -> z*h > >How do I get Mathematica to perform this kind of algebraic >substitutions (on complex formulas)? > Alessio, Here is one approach: a^2/b^2 /. Solve[c==a/b, a] {c^2} a^2/b^2 /. Solve[c==a/b, b] {c^2} h^3/t^2 /. Solve[z==h^2/t^2, t] {h z,h z} %//Union {h z} Bob Hanlon