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 >