Re: matrix algebra

*To*: mathgroup at smc.vnet.net*Subject*: [mg3699] Re: [mg3683] matrix algebra*From*: Robert Pratt <rpratt at math.unc.edu>*Date*: Mon, 8 Apr 1996 02:05:56 -0400*Sender*: owner-wri-mathgroup at wolfram.com

Sometimes partitioned matrices are called block matrices, and that's what Mma calls them. Check out BlockMatrix in the standard package LinearAlgebra`MatrixManipulation` Rob Pratt Department of Mathematics The University of North Carolina at Chapel Hill CB# 3250, 331 Phillips Hall Chapel Hill, NC 27599-3250 rpratt at math.unc.edu On Fri, 5 Apr 1996, Juan Garcia Velo wrote: > Does anybody know of a package of functions and operators that can deal > with partitioned matrices? Example: > mat_a = [ a b ] mat_b = [ d c ] > [ c d ] [ b a ] > where a, b, c, d are matrices (although not necessarily defined) of > appropriate dimensions. Then I can do MULT[mat_a,mat_b] and get > mat_c = [ a d + b b a c + b a ] > [ c d + d b c c + d a ] > without any attempt of changing the order in the products defining the > elements of mat_c, because they are matrices, obviously. > > I already explored the wolfram web site and didn't find anything. > Thanks, > > Juan > > -- > Juan Garcia-Velo garciajb at ucunix.san.uc.edu > Aerospace Engineering, ML 70 > University of Cincinnati My .sig file does not accurately > Cincinnati, OH 45221, USA reflect the owner's creativity. > > ==== [MESSAGE SEPARATOR] ====