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Re: Replacement equivalence?

• To: mathgroup at smc.vnet.net
• Subject: [mg63239] Re: Replacement equivalence?
• From: David Bailey <dave at Remove_Thisdbailey.co.uk>
• Date: Tue, 20 Dec 2005 04:19:38 -0500 (EST)
• References: <do6892$b1t$1@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

carlos at colorado.edu wrote:
> This is a spinoff of an ongoing thread in s.m.s.  Could the nonlinear
> replacement
> 
>                            b^2 -> 1
> 
> be changed to the linear one
> 
>                            b-> 1||-1
> 
> Similarly
>              x^4 -> 16     to    x ->  2||-2||2*I||-2*I
> 
> Any possible side effects?
> 
Hello,

Quite a few really, for example:

b^2 /. b -> 1 || -1

      (1 || -1)^2

David Bailey
http://www.dbaileyconsultancy.co.uk

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    • From: Pratik Desai <pdesai1@umbc.edu>
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    • From: Andrzej Kozlowski <akoz@mimuw.edu.pl>