rowcompr row compression of polynomial matrix [X,rk,Ac]=rowcompr(A) A polynomial matrix Y square polynomial matrix (left unimodular basis) rk normal rank of A Ac Ac=X*A, polynomial matrix row compression of polynomial matrix A. X is a left polynomial unimodular basis which row compressed thee rows of A. rk is the normal rank of A. Warning: elimination of "small" terms (use with care!). colcompr