Re: redefine Power[A_?MatrixQ,-1]
- To: mathgroup at smc.vnet.net
- Subject: [mg32629] Re: [mg32593] redefine Power[A_?MatrixQ,-1]
- From: Mianlai Zhou <lailai at nikhef.nl>
- Date: Fri, 1 Feb 2002 02:02:31 -0500 (EST)
- Sender: owner-wri-mathgroup at wolfram.com
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 > >