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
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