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dlasq6(l) [redhat man page]

DLASQ6(l)								 )								 DLASQ6(l)

NAME

       DLASQ6 - compute one dqd (shift equal to zero) transform in ping-pong form, with protection against underflow and overflow

SYNOPSIS

       SUBROUTINE DLASQ6( I0, N0, Z, PP, DMIN, DMIN1, DMIN2, DN, DNM1, DNM2 )

	   INTEGER	  I0, N0, PP

	   DOUBLE	  PRECISION DMIN, DMIN1, DMIN2, DN, DNM1, DNM2

	   DOUBLE	  PRECISION Z( * )

PURPOSE

       DLASQ6 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) DOUBLE PRECISION 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) DOUBLE PRECISION
	     Minimum value of d.

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

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

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

       DNM1  (output) DOUBLE PRECISION
	     d(N0-1).

       DNM2  (output) DOUBLE PRECISION
	     d(N0-2).

LAPACK version 3.0						   15 June 2000 							 DLASQ6(l)

Check Out this Related Man Page

dlasq6.f(3)							      LAPACK							       dlasq6.f(3)

NAME

       dlasq6.f -

SYNOPSIS

   Functions/Subroutines
       subroutine dlasq6 (I0, N0, Z, PP, DMIN, DMIN1, DMIN2, DN, DNM1, DNM2)
	   DLASQ6 computes one dqd transform in ping-pong form. Used by sbdsqr and sstegr.

Function/Subroutine Documentation
   subroutine dlasq6 (integerI0, integerN0, double precision, dimension( * )Z, integerPP, double precisionDMIN, double precisionDMIN1, double
       precisionDMIN2, double precisionDN, double precisionDNM1, double precisionDNM2)
       DLASQ6 computes one dqd transform in ping-pong form. Used by sbdsqr and sstegr.

       Purpose:

	    DLASQ6 computes one dqd (shift equal to zero) transform in
	    ping-pong form, with protection against underflow and overflow.

       Parameters:
	   I0

		     I0 is INTEGER
		   First index.

	   N0

		     N0 is INTEGER
		   Last index.

	   Z

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

	   PP

		     PP is INTEGER
		   PP=0 for ping, PP=1 for pong.

	   DMIN

		     DMIN is DOUBLE PRECISION
		   Minimum value of d.

	   DMIN1

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

	   DMIN2

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

	   DN

		     DN is DOUBLE PRECISION
		   d(N0), the last value of d.

	   DNM1

		     DNM1 is DOUBLE PRECISION
		   d(N0-1).

	   DNM2

		     DNM2 is DOUBLE PRECISION
		   d(N0-2).

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   September 2012

       Definition at line 119 of file dlasq6.f.

Author
       Generated automatically by Doxygen for LAPACK from the source code.

Version 3.4.2							  Tue Sep 25 2012						       dlasq6.f(3)
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