redhat man page for slasq6

SLASQ6(l)								 )								 SLASQ6(l)

NAME
       SLASQ6 - compute one dqd (shift equal to zero) transform in ping-pong form, with protection against underflow and overflow

SYNOPSIS
       SUBROUTINE SLASQ6( I0, N0, Z, PP, DMIN, DMIN1, DMIN2, DN, DNM1, DNM2 )

	   INTEGER	  I0, N0, PP

	   REAL 	  DMIN, DMIN1, DMIN2, DN, DNM1, DNM2

	   REAL 	  Z( * )

PURPOSE
       SLASQ6 computes one dqd (shift equal to zero) transform in ping-pong form, with protection against underflow and overflow.

ARGUMENTS
       I0    (input) INTEGER
	     First index.

       N0    (input) INTEGER
	     Last index.

       Z     (input) REAL array, dimension ( 4*N )
	     Z holds the qd array. EMIN is stored in Z(4*N0) to avoid an extra argument.

       PP    (input) INTEGER
	     PP=0 for ping, PP=1 for pong.

       DMIN  (output) REAL
	     Minimum value of d.

	     DMIN1 (output) REAL Minimum value of d, excluding D( N0 ).

	     DMIN2 (output) REAL Minimum value of d, excluding D( N0 ) and D( N0-1 ).

       DN    (output) REAL
	     d(N0), the last value of d.

       DNM1  (output) REAL
	     d(N0-1).

       DNM2  (output) REAL
	     d(N0-2).

LAPACK version 3.0						   15 June 2000 							 SLASQ6(l)