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slasq4.3lapack
Langue: en
Version: 280092 (debian - 07/07/09)
Section: 3 (Bibliothèques de fonctions)
Sommaire
NAME
SLASQ4 - computes an approximation TAU to the smallest eigenvalue using values of d from the previous transformSYNOPSIS
- SUBROUTINE SLASQ4(
- I0, N0, Z, PP, N0IN, DMIN, DMIN1, DMIN2, DN, DN1, DN2, TAU, TTYPE, G )
- INTEGER I0, N0, N0IN, PP, TTYPE
- REAL DMIN, DMIN1, DMIN2, DN, DN1, DN2, G, TAU
- REAL Z( * )
PURPOSE
SLASQ4 computes an approximation TAU to the smallest eigenvalue using values of d from the previous transform. I0 (input) INTEGERFirst index.
N0 (input) INTEGER
Last index.
Z (input) REAL array, dimension ( 4*N )
Z holds the qd array.
PP (input) INTEGER
PP=0 for ping, PP=1 for pong.
NOIN (input) INTEGER
The value of N0 at start of EIGTEST.
DMIN (input) REAL
Minimum value of d.
DMIN1 (input) REAL
Minimum value of d, excluding D( N0 ).
DMIN2 (input) REAL
Minimum value of d, excluding D( N0 ) and D( N0-1 ). DN (input) REAL
d(N)
DN1 (input) REAL
d(N-1)
DN2 (input) REAL
d(N-2)
TAU (output) REAL
This is the shift.
TTYPE (output) INTEGER
Shift type.
G (input/output) REAL
G is passed as an argument in order to save its value between
calls to SLASQ4.
FURTHER DETAILS
Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre