table of contents
other versions
- jessie 3.5.0-4
- jessie-backports 3.7.0-1~bpo8+1
- stretch 3.7.0-2
- testing 3.8.0-1
- unstable 3.8.0-1
ssterf.f(3) | LAPACK | ssterf.f(3) |
NAME¶
ssterf.f -SYNOPSIS¶
Functions/Subroutines¶
subroutine ssterf (N, D, E, INFO)
Function/Subroutine Documentation¶
subroutine ssterf (integerN, real, dimension( * )D, real, dimension( * )E, integerINFO)¶
SSTERF Purpose:SSTERF computes all eigenvalues of a symmetric tridiagonal matrix using the Pal-Walker-Kahan variant of the QL or QR algorithm.
N
Author:
N is INTEGER The order of the matrix. N >= 0.D
D is REAL array, dimension (N) On entry, the n diagonal elements of the tridiagonal matrix. On exit, if INFO = 0, the eigenvalues in ascending order.E
E is REAL array, dimension (N-1) On entry, the (n-1) subdiagonal elements of the tridiagonal matrix. On exit, E has been destroyed.INFO
INFO is INTEGER = 0: successful exit < 0: if INFO = -i, the i-th argument had an illegal value > 0: the algorithm failed to find all of the eigenvalues in a total of 30*N iterations; if INFO = i, then i elements of E have not converged to zero.
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date:
November 2011
Definition at line 87 of file ssterf.f.
Author¶
Generated automatically by Doxygen for LAPACK from the source code.Wed Oct 15 2014 | Version 3.4.2 |