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Re: Question about Hold

• To: mathgroup at smc.vnet.net
• Subject: [mg48820] Re: Question about Hold
• From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
• Date: Fri, 18 Jun 2004 02:12:42 -0400 (EDT)
• Organization: Universitaet Leipzig
• References: <carjrn$r76$1@smc.vnet.net>
• Reply-to: kuska at informatik.uni-leipzig.de
• Sender: owner-wri-mathgroup at wolfram.com

Hi,

Commute[a, b] := c
Commute[a^n_, b] := Commute[a^(n - 1), Commute[a, b]]

Regards
  Jens

Daohua Song wrote:
> 
> Hi,evryone,
>     I define a commute relation for quantum operators,i fact i learn this
> from the forum.Here is the problem.
>     Commute[A,B]=C.
>     Commute[A^2,B], i try to use Hold[A*A] instead of A^2, then mathematica
> even won't evaluate it.!
>     Any suggestion to work on the power commutation?
>     Thanks
> Daohua

• Follow-Ups:
  • Re: Re: Question about Hold
    • From: Oleksandr Pavlyk <pavlyk@phys.psu.edu>