Scilab Function

hess - Hessenberg form

Calling Sequence

H = hess(A)
[U,H] = hess(A)

Parameters

Description

produces a unitary matrix U and a Hessenberg matrix H so that A = U*H*U' and U'*U = Identity. By itself, hess(A) returns H.

The Hessenberg form of a matrix is zero below the first subdiagonal. If the matrix is symmetric or Hermitian, the form is tridiagonal.

REFERENCES

Examples

See Also