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Redefine Power

• To: mathgroup at smc.vnet.net
• Subject: [mg65781] Redefine Power
• From: suchaneck <greenux at gmx.de>
• Date: Mon, 17 Apr 2006 02:28:38 -0400 (EDT)
• Reply-to: greenux at gmx.de
• Sender: owner-wri-mathgroup at wolfram.com

hi,
i want to redefine the Power function for matrices like that:
Power[A_?MatrixQ,n_]:=mppower[A,n];
If n is a number, then it should execute the function mppower[], elseif
Head[n]=symbol, it should return the matrix with exp n as symbol
without execution. How can I prevent the recursion of the Power-Function?
Thanks.