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- D
- (input/output) REAL array shape
with
(D)
, where
is the order of
.
On entry, the diagonal elements of the matrix
.
On exit, the eigenvalues in ascending order.
- E
- (input/output) REAL array, shape
with
(E)
.
On entry, the
subdiagonal elements of
in E
to E
.
need not be set but is used by the routine.
On exit, the contents of E are destroyed.
- Z
- Optional (output) REAL square array,
shape
with
(Z,1)
.
The columns of
contain the
orthonormal eigenvectors of
in the order of the eigenvalues.
- INFO
- Optional (output) INTEGER.
If INFO is not present and an error occurs, then the
program is terminated with an error message.
References: [1] and [17,9,20].
Susan Blackford
2001-08-19