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Re: Symbolic matrix manipulation

  • To: mathgroup at
  • Subject: [mg46863] Re: Symbolic matrix manipulation
  • From: David Gunter <spam at>
  • Date: Fri, 12 Mar 2004 02:02:47 -0500 (EST)
  • References: <c238jv$ii5$> <c29888$52u$>
  • Sender: owner-wri-mathgroup at

Does anyone have an answer to this that doesn't require access to a 
journal for which I have no subscription?


Paul Abbott wrote:

> In article <c238jv$ii5$1 at>, junk4 at (C Rose) 
> wrote:
>>I'd like to know how one can perform symbolic matrix-vector
>>manipulations in Mathematica, without having to specify the contents
>>of the matrices or vectors.
>>For example, imagine I have a vector-valued function
>>f(x) = x^T A
>>where A is a m x n matrix, x is an m-vector, and ^T indicates
>>How can I differentiate f(x)---or perform other symbolic operations
>>using matrices or vectors---such that I get the result in terms of A
>>and x (i.e. I don't want to have to specify that
>>A={{a11, a12, a13}, {a21, a22, a23}, {a31, a32, a33}} or whatever).
>>So, in the example above, I want Mathematica to tell me the answer is
>>d/dx (f) = A
>>I'd appreciate your advice on this matter.
> See The Mathematica Journal 8(4) (2002): 529-531
> Cheers,
> Paul

Replace spam with david if you wish to send email to my directly.

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