htrianr

triangularization of polynomial matrix

Calling Sequence

[Ar,U,rk]=htrianr(A)

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