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Re: Transformations in expressions

  • To: mathgroup at smc.vnet.net
  • Subject: [mg91889] Re: [mg91874] Transformations in expressions
  • From: "peter lindsay" <pl.0 at me.com>
  • Date: Fri, 12 Sep 2008 05:25:25 -0400 (EDT)
  • References: <200809111015.GAA01226@smc.vnet.net>

Log[x^2 + y^3]/Sin[x^2 + y^3] /. x^2 + y^3 -> z

2008/9/11 Miguel <misvrne at gmail.com>:
> Hi all,
> How can I to transform a specific expression to other by substitution
> of a part of it.
>
> For example, I want to transform the expression Log[x^2+y^3]/
> Sin[x^2+y^3] in Log[z]/Sin[z] by substitution x^2+y^3 --> z.
>
> And other question: Is the new expression dependent of z. I see it is,
> but how can I to programar it.
>
> Thanks
>
>



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