matrix M 
integer p result matrix
Compute the determinants of all the p by p minors of the given m
by n matrix. The resulting matrix 
has size 
by 
. The signs are chosen so that if C = A.B, where A
and B are matrices, then 
.
For example,
% type m ; a b c ; d e f ; g h i % wedge m 2 n % type n ; -bd+ae cd-af -ce+bf ; bg-ah -cg+ai ch-bi ; -eg+dh fg-di -fh+ei
Use the flatten command to find the ideal of all of these determinants.