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MathGroup Archive 2002

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Re: MatrixForm Oddity

  • To: mathgroup at smc.vnet.net
  • Subject: [mg35663] Re: [mg35654] MatrixForm Oddity
  • From: BobHanlon at aol.com
  • Date: Thu, 25 Jul 2002 04:45:49 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

In a message dated 7/24/02 3:20:33 AM, siegman at stanford.edu writes:

>Construct a matrix which has symbol  a  in the upper left (1,1) element
>
>and symbols  I c  in the rest of the top row and the left-most column,
>
>dot it into itself three times, and display the result using MatrixForm.
>
>The top row in the display now has  I c (a^2 - 4c^2) ; the left-most 
>column now has  I a^2 c - 4 I c^3 .  Not exactly a serious problem, but
>
>not exactly clean either.  Makes it harder to see at a glance whether a
>
>given matrix is symmetric above the diagonal (could be a problem in a 
>more complicated situation).  Could possibly mess up the behavior of 
>pattern matching rules?

use Simplify

m.m.m // Simplify


Bob Hanlon
Chantilly, VA  USA


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