htrianr

Arguments

A

polynomial matrix

Ar

polynomial matrix

U

unimodular polynomial matrix.

rk

integer, normal rank of A

Description

triangularization of polynomial matrix A.

A is [m,n] , m ≤ n.

Ar=A*U

Warning: there is an elimination of "small" terms (see function code).

Examples

x = poly(0,'x');
M = [x ; x^2 ; 2+x^3]*[1, x-2, x^4];
[Mu,U,rk] = htrianr(M)
det(U)
M*U(:,1:2)

See also

• hrmt — gcd of polynomials
• colcompr — column compression of polynomial matrix