MatrixReplace.m
- To: mathgroup at smc.vnet.net
- Subject: [mg25001] MatrixReplace.m
- From: Giovanni Scoglio <g_scoglio at yahoo.it>
- Date: Fri, 1 Sep 2000 01:09:34 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
Hi everybody Roger Kirchner in MatrixReplace.m (http://mathsource.wri.com/Content/Enhancements/Algebraic/0202-284) says : " MatrixReplace[f[x], x -> A] returns f[A], where multiplication is matrix multiplication. " Well, let mat = {{1, 2}, {2, 3}} MatrixPower[mat, 3] gives {{21, 34}, {34, 55}} :-) and 1 + MatrixPower[mat, 3] gives {{22, 35}, {35, 56}} :-) Why does MatrixReplace[1 + x^3, x -> mat] return {{22, 34}, {34, 56}} instead ? :-( It this a bug ? Is there something unclear to me in the concept of matrix function ? Buon lavoro a tutti ! Giovanni Scoglio ______________________________________________________________________ Do You Yahoo!? Il tuo indirizzo gratis e per sempre @yahoo.it su http://mail.yahoo.it