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Re: Matrix-Multiplication w NonCommutative Entries?

• To: mathgroup at smc.vnet.net
• Subject: [mg95149] Re: Matrix-Multiplication w NonCommutative Entries?
• From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
• Date: Wed, 7 Jan 2009 07:11:52 -0500 (EST)
• Organization: Uni Leipzig
• References: <gk1rcr$olc$1@smc.vnet.net>
• Reply-to: kuska at informatik.uni-leipzig.de

Hi,

use Inner[] instead of Dot[] because:

Inner[f,list1,list2,g] is a generalization of Dot in which f plays the 
role of multiplication and g of addition.

Regards
   Jens

Thomas wrote:
> Hi there, 
> I want to multiply matrices with quaternionic entries in Mathematica. Dot (.) uses normal multiplication (*) for the entries. I need to change this to NonCommutativeMultiply (**) Then this would work with the Quaternions package.
> Does anybody know, how to do this?
> 
> Thanks a lot,
> 
> Thomas
>