Usage:
<adj_of_cat p q j
Produces the p by p+q-1 adjoint matrix
of a p by q catalecticant matrix, which is
(for p=3,q=2) a matrix of the form
a b 0 0
0 a b 0
0 0 a b .
Parameters:
p,q = number of rows, number of variables
Output values:
j = p x (p+q-1) matrix
The entries of j are from the first q variables of the current ring.
The matrix j is the traditional answer to the problem
of producing a matrix whose pxp minors generate the pth
power of the maximal ideal in q variables.