For the matrix " matrix M =([m,0],[0,m]), the power M^n is determined correctly.
However, for other matrices, e.g. P =([3,1],[1,3])Maxima determines P^2 as matrix([9,1],[1,9]), instead of the correct: matrix([10,6],[6,10])
I haven't tried multiplying more general matrices, but does this mean there is a problem with matrix multiplication?
Maxima build as follows:
Maxima version: 5.15.0
Maxima build date: 17:36 4/20/2008
host type: i686-pc-mingw32
lisp-implementation-type: GNU Common Lisp (GCL)
lisp-implementation-version: GCL 2.6.8
Raymond Toy
2008-09-24
Please be more explicit and show exactly what you did.
However, I suspect you used * to multiply matrices. This is an element-by-element multiply. The matrix multiply operator is ".". So:
p:matrix([3,1],[1,3]);
p . p;
matrix([10,6],[6,10])
Marking as pending/invalid.
Raymond Toy
2008-09-24
Barton Willis
2008-10-01
Another thing: to square a matrix, use "^^" not "^".
SourceForge Robot
2008-10-08
This Tracker item was closed automatically by the system. It was
previously set to a Pending status, and the original submitter
did not respond within 14 days (the time period specified by
the administrator of this Tracker).
SourceForge Robot
2008-10-08