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MathGroup Archive 1997

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Re: suppressing certain simplifications

  • To: mathgroup at smc.vnet.net
  • Subject: [mg7576] Re: [mg7529] suppressing certain simplifications
  • From: jpk at max.mpae.gwdg.de
  • Date: Thu, 19 Jun 1997 03:13:40 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

> From JohnK239 at aol.com Fri Jun 13 10:51:28 1997
> Date: Fri, 13 Jun 1997 03:08:42 -0400 (EDT)
> From: John Kiehl <JohnK239 at aol.com>
To: mathgroup at smc.vnet.net
> To: mathgroup at smc.vnet.net
> Subject: [mg7576] [mg7529] suppressing certain simplifications
> 
> How can I prevent h*h*h being "simplified" to h^3?  
> Furthermore, how can I amend the Power[...] function to 
> behave in the following manner:   
> h^5 transforms into h*h*h*h*h
> 
> More specifically, how can I get (h*g)^2 to be displayed as:
> (h*g)*(h*g).
> 
> I'm playing with simple group theory where sometimes hg=gh 
> and other times hg=gh^(-1).
> 

At first don't use Times[] use NonCommutativeMultiply (h ** h ** h) for
symbolic calculations.

You can also remove the Orderless Attribute from Times so that
 h*h* a*h  is simplifyed to h^2 *a *h. How ever that's not a good idea
 for any other calculation.
 
 Hope that helps
 Jens




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