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RedHat 9 (Linux i386) - man page for slasq4 (redhat section l)

SLASQ4(l)						  )						    SLASQ4(l)

NAME
SLASQ4 - compute an approximation TAU to the smallest eigenvalue using values of d from the previous transform
SYNOPSIS
SUBROUTINE SLASQ4( I0, N0, Z, PP, N0IN, DMIN, DMIN1, DMIN2, DN, DN1, DN2, TAU, TTYPE ) INTEGER I0, N0, N0IN, PP, TTYPE REAL DMIN, DMIN1, DMIN2, DN, DN1, DN2, TAU REAL Z( * )
PURPOSE
SLASQ4 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) 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.
FURTHER DETAILS
LAPACK version 3.0 15 June 2000 SLASQ4(l)


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