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