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MathGroup Archive 2001

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Re: Overriding Power

  • To: mathgroup at smc.vnet.net
  • Subject: [mg26868] Re: Overriding Power
  • From: Jeff Hersh <frumple*NOSPAM* at home.com>
  • Date: Fri, 26 Jan 2001 01:27:17 -0500 (EST)
  • References: <94m9e5$3nu@smc.vnet.net> <94oh4k$ee1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

In article <94oh4k$ee1 at smc.vnet.net>, Roland Franzius 
<Roland.Franzius at uos.de> wrote:

> Jeff Hersh wrote:
> 
> > I am working on a package that deals with non-communative multiplication
> > and I have run into a problem with the Power function. As we know
> > Power[a b,n] (where n is an integer) automatically gets converted to
> > Power[a,n] Power[b,n]. However, with non-communative multiplication (I
> > have removed the Orderless attribute from Times to make it
> > non-communative) this isn't valid. Is there any way I can stop
> > Mathematica from automatically doing this conversion?
> 
> Hi Jeff,
> I recommend to avoid overloading the existing algebraic functions with
> arguments  from a noncommutive algebra. Write your own functions and use
> Format for pretty printing the results. Especially for Power, Exp there
> are MatrixPower, MatrixExp which have build  features you are requiring.
> 
> regards, Roland

In that case does anyone know how to change the precedence of a function 
so it is parenthesied correctly?  In other words I want the power 
function to have the same precedence as Power.

Jeff
-- 
Jeffrey Hersh,PhD

Remove the *NOSPAM* to reply.

<insert amusing quote here>


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