debian man page for zlaqhp

zlaqhp.f(3)							      LAPACK							       zlaqhp.f(3)

NAME
       zlaqhp.f -

SYNOPSIS
   Functions/Subroutines
       subroutine zlaqhp (UPLO, N, AP, S, SCOND, AMAX, EQUED)
	   ZLAQHP

Function/Subroutine Documentation
   subroutine zlaqhp (characterUPLO, integerN, complex*16, dimension( * )AP, double precision, dimension( * )S, double precisionSCOND, double
       precisionAMAX, characterEQUED)
       ZLAQHP

       Purpose:

	    ZLAQHP equilibrates a Hermitian matrix A using the scaling factors
	    in the vector S.

       Parameters:
	   UPLO

		     UPLO is CHARACTER*1
		     Specifies whether the upper or lower triangular part of the
		     Hermitian matrix A is stored.
		     = 'U':  Upper triangular
		     = 'L':  Lower triangular

	   N

		     N is INTEGER
		     The order of the matrix A.  N >= 0.

	   AP

		     AP is COMPLEX*16 array, dimension (N*(N+1)/2)
		     On entry, the upper or lower triangle of the Hermitian matrix
		     A, packed columnwise in a linear array.  The j-th column of A
		     is stored in the array AP as follows:
		     if UPLO = 'U', AP(i + (j-1)*j/2) = A(i,j) for 1<=i<=j;
		     if UPLO = 'L', AP(i + (j-1)*(2n-j)/2) = A(i,j) for j<=i<=n.

		     On exit, the equilibrated matrix:	diag(S) * A * diag(S), in
		     the same storage format as A.

	   S

		     S is DOUBLE PRECISION array, dimension (N)
		     The scale factors for A.

	   SCOND

		     SCOND is DOUBLE PRECISION
		     Ratio of the smallest S(i) to the largest S(i).

	   AMAX

		     AMAX is DOUBLE PRECISION
		     Absolute value of largest matrix entry.

	   EQUED

		     EQUED is CHARACTER*1
		     Specifies whether or not equilibration was done.
		     = 'N':  No equilibration.
		     = 'Y':  Equilibration was done, i.e., A has been replaced by
			     diag(S) * A * diag(S).

       Internal Parameters:

	     THRESH is a threshold value used to decide if scaling should be done
	     based on the ratio of the scaling factors.  If SCOND < THRESH,
	     scaling is done.

	     LARGE and SMALL are threshold values used to decide if scaling should
	     be done based on the absolute size of the largest matrix element.
	     If AMAX > LARGE or AMAX < SMALL, scaling is done.

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   November 2011

       Definition at line 127 of file zlaqhp.f.

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

Version 3.4.1							  Sun May 26 2013						       zlaqhp.f(3)