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Re: redefine Power[A_?MatrixQ,-1]

Hi, it does not work because the internal attribute Listable of Power
takes the priority.

To make it work, just add the command

ClearAttributes[Power, Listable]

before your Power[A_?MatrixQ,-1] := Inverse[A] .

Good Luck!

Mianlai Zhou
Theory Group, NIKHEF
Amsterdam, The Netherlands

On Thu, 31 Jan 2002, Cyril Fischer wrote:

> Hi,
> How can I redefine Power[A_?MatrixQ,-1] := Inverse[A] ?
> Issuing
> Unprotect[Power];
> Power[A_?MatrixQ,-1] := Inverse[A]
> does not work.
> Thanks, Cyril

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