Re: mathematica newbie question

*To*: mathgroup at smc.vnet.net*Subject*: [mg66896] Re: mathematica newbie question*From*: "ben" <benjamin.friedrich at gmail.com>*Date*: Sat, 3 Jun 2006 03:25:14 -0400 (EDT)*References*: <e5osv8$i51$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Hi Jeremy, matrix multiplication can be component-wise (A^2,A*B,...), OR be a matrix multiplication in the genuine sense (A.B, MatrixPower[A,2], ...). Bye Ben > Hi, > > Just trying to get to grips with Mathematica and matrices. Why is it when I > enter :- > {0, 0, 0}, {1, -1, -1}, {-1, 1, 1}}^2 > > then Mathematica returns :- > > {{0, 0, 0}, {1, 1, 1}, {1, 1, 1}} > > and not {{0,0,0},{0,0,0},{0,0,0}} (the actual square of the matrix) as I'd > have expected? > > Is it treating what I entered as separate vectors or something, and not an > actual matrix? > > Thanks