redhat man page for slasq4

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)