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MathGroup Archive 1995

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Re: How to simplify transposed terms?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg2758] Re: How to simplify transposed terms?
  • From: rubin at msu.edu (Paul A. Rubin)
  • Date: Wed, 13 Dec 1995 02:02:19 -0500
  • Organization: Michigan State University

In article <4a8qeb$5l3 at dragonfly.wri.com>, that ignoramus 
   rubin at msu.edu (Paul A. Rubin) wrote:
[blather, blather, blather ...]
->  Unprotect[Transpose];
->  Transpose[ A_ B_ ] := Transpose[ B ] Transpose[ A ] /;
->    MatrixQ[ A ] && MatrixQ[ B ]
[etc.]
->  In[]:= A /: MatrixQ[ A ] := True
->  In[]:= B /: MatrixQ[ B ] := True
->  In[]:= Transpose[ A B ]
->  Out[]= Transpose[A]*Transpose[B]

It's been pointed out to me that distributing Transpose across Times isn't 
the brightest of moves.  Mea culpa:  That should have been Dot, not Times.

Paul Rubin

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they translate it into their own language, and at once it is something
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