colcompr

colcompr — column compression of polynomial matrix

Calling sequence

[Y,rk,ac]=colcompr(A);

`A`	: polynomial matrix
`Y`	: square polynomial matrix (right unimodular basis)
`rk`	: normal rank of `A`
`Ac`	: `Ac=A*Y`, polynomial matrix

column compression of polynomial matrix A (compression to the left)



s=poly(0,'s');
p=[s;s*(s+1)^2;2*s^2+s^3];
[Y,rk,ac]=colcompr(p*p');
p*p'*Y