Flashnux

GNU/Linux man pages

Livre :
Expressions régulières,
Syntaxe et mise en oeuvre :

ISBN : 978-2-7460-9712-4
EAN : 9782746097124
(Editions ENI)

GNU/Linux

CentOS 4.8

 i386

dlasq4(l)
DLASQ4

DLASQ4

NAME
SYNOPSIS
PURPOSE
FURTHER DETAILS

NAME

DLASQ4 - compute an approximation TAU to the smallest eigenvalue using values of d from the previous transform

SYNOPSIS

SUBROUTINE DLASQ4(

I0, N0, Z, PP, N0IN, DMIN, DMIN1, DMIN2, DN, DN1, DN2, TAU, TTYPE )

INTEGER

I0, N0, N0IN, PP, TTYPE

DOUBLE

PRECISION DMIN, DMIN1, DMIN2, DN, DN1, DN2, TAU

DOUBLE

PRECISION Z( * )

PURPOSE

DLASQ4 computes an approximation TAU to the smallest eigenvalue using values of d from the previous transform. I0 (input) INTEGER
First index.

N0 (input) INTEGER
Last index.

Z (input) DOUBLE PRECISION 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) DOUBLE PRECISION
Minimum value of d.

DMIN1 (input) DOUBLE PRECISION
Minimum value of d, excluding D( N0 ).

DMIN2 (input) DOUBLE PRECISION
Minimum value of d, excluding D( N0 ) and D( N0-1 ).

DN (input) DOUBLE PRECISION
d(N)

DN1 (input) DOUBLE PRECISION
d(N-1)

DN2 (input) DOUBLE PRECISION
d(N-2)

TAU (output) DOUBLE PRECISION
This is the shift.

TTYPE (output) INTEGER
Shift type.

FURTHER DETAILS

dlasq4(l)