Subject: Nullspace(M) takes a lot of time for a big matrix
From: Barton Willis
Date: Wed, 9 May 2007 16:54:15 -0500
-----maxima-bounces at math.utexas.edu wrote: -----
>Now i'm trying to find a nullspace of a 243x270 matrix. It has a lot
>of zeros. Actually, it has nonzeros in 5 place in each row. Some of
>nonzero elements are 1, -1. Some are symbolic a, b, c. ( a, b, c are
>declared constants. )
Try something like
ratmx : true$
nullspace(rat(m))$
Let us know what happens (I'm not optimistic)
Barton