Re: Placeholders in matrix notation

*To*: mathgroup at smc.vnet.net*Subject*: [mg29899] Re: Placeholders in matrix notation*From*: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>*Date*: Wed, 18 Jul 2001 02:08:43 -0400 (EDT)*Organization*: Universitaet Leipzig*References*: <9j0hhl$fjn$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Hmm, perhaps because {D[#,x],0} is an operator ? and it has nothing to do with an dot product but Inner[#1[#2] &, {D[#, x] &, 0*# &}, {f[x], g[x]}] will work. Regards Jens "Douglas F." wrote: > > I want to use the partial differential operator in matrix algebra. The function > it operates on would be in another matrix. > > Here, I am using "d" to represent the partial operator > {esc}pd{esc}{ctrl-_}x{ctrl-space} > > [d 0] . Transpose[ f[x]| g[x] ] > > But Mathematica won't let me do the matrix multiplication. How do you do that? > > -D

**Follow-Ups**:**Re: Re: Placeholders in matrix notation***From:*"Hugh Philipp" <hph@com.dtu.dk>