dsterf
dsterf - compute all eigenvalues of a symmetric tridiagonal matrix using the Pal-Walker-Kahan variant of the QL or QR algorithm
SUBROUTINE DSTERF( N, D, E, INFO)
INTEGER N, INFO
DOUBLE PRECISION D(*), E(*)
SUBROUTINE DSTERF_64( N, D, E, INFO)
INTEGER*8 N, INFO
DOUBLE PRECISION D(*), E(*)
SUBROUTINE STERF( [N], D, E, [INFO])
INTEGER :: N, INFO
REAL(8), DIMENSION(:) :: D, E
SUBROUTINE STERF_64( [N], D, E, [INFO])
INTEGER(8) :: N, INFO
REAL(8), DIMENSION(:) :: D, E
#include <sunperf.h>
void dsterf(int n, double *d, double *e, int *info);
void dsterf_64(long n, double *d, double *e, long *info);
dsterf computes all eigenvalues of a symmetric tridiagonal matrix
using the Pal-Walker-Kahan variant of the QL or QR algorithm.
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* N (input)
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The order of the matrix. N >= 0.
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* D (input/output)
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On entry, the n diagonal elements of the tridiagonal matrix.
On exit, if INFO = 0, the eigenvalues in ascending order.
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* E (input/output)
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On entry, the (n-1) subdiagonal elements of the tridiagonal
matrix.
On exit, E has been destroyed.
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* INFO (output)
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