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