f02aaf
f02aaf
© Numerical Algorithms Group, 2002.
Purpose
F02AAF All eigenvalues of real symmetric matrix (Black Box)
Synopsis
[r,ifail] = f02aaf(a<,ifail>)
Description
This routine reduces the real symmetric matrix A to a real
symmetric tridiagonal matrix using Householder's method. The
eigenvalues of the tridiagonal matrix are then determined using
the QL algorithm.
Parameters
f02aaf
Required Input Arguments:
a (:,:) real
Optional Input Arguments: <Default>
ifail integer -1
Output Arguments:
r (:) real
ifail integer