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dlasq5.f(3)				      LAPACK				      dlasq5.f(3)

NAME
       dlasq5.f -

SYNOPSIS
   Functions/Subroutines
       subroutine dlasq5 (I0, N0, Z, PP, TAU, SIGMA, DMIN, DMIN1, DMIN2, DN, DNM1, DNM2, IEEE,
	   EPS)
	   DLASQ5 computes one dqds transform in ping-pong form. Used by sbdsqr and sstegr.

Function/Subroutine Documentation
   subroutine dlasq5 (integerI0, integerN0, double precision, dimension( * )Z, integerPP, double
       precisionTAU, double precisionSIGMA, double precisionDMIN, double precisionDMIN1, double
       precisionDMIN2, double precisionDN, double precisionDNM1, double precisionDNM2,
       logicalIEEE, double precisionEPS)
       DLASQ5 computes one dqds transform in ping-pong form. Used by sbdsqr and sstegr.

       Purpose:

	    DLASQ5 computes one dqds transform in ping-pong form, one
	    version for IEEE machines another for non IEEE machines.

       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.

	   TAU

		     TAU is DOUBLE PRECISION
		   This is the shift.

	   SIGMA

		     SIGMA is DOUBLE PRECISION
		   This is the accumulated shift up to this step.

	   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).

	   IEEE

		     IEEE is LOGICAL
		   Flag for IEEE or non IEEE arithmetic.

	   EPS

		     EPS is DOUBLE PRECISION
		   This is the value of epsilon used.

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   September 2012

       Definition at line 144 of file dlasq5.f.

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

Version 3.4.2				 Tue Sep 25 2012			      dlasq5.f(3)
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