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CentOS 7.0 - man page for dla_syrcond (centos section 3)

dla_syrcond.f(3)			      LAPACK				 dla_syrcond.f(3)

NAME
       dla_syrcond.f -

SYNOPSIS
   Functions/Subroutines
       DOUBLE PRECISION function dla_syrcond (UPLO, N, A, LDA, AF, LDAF, IPIV, CMODE, C, INFO,
	   WORK, IWORK)
	   DLA_SYRCOND estimates the Skeel condition number for a symmetric indefinite matrix.

Function/Subroutine Documentation
   DOUBLE PRECISION function dla_syrcond (characterUPLO, integerN, double precision, dimension(
       lda, * )A, integerLDA, double precision, dimension( ldaf, * )AF, integerLDAF, integer,
       dimension( * )IPIV, integerCMODE, double precision, dimension( * )C, integerINFO, double
       precision, dimension( * )WORK, integer, dimension( * )IWORK)
       DLA_SYRCOND estimates the Skeel condition number for a symmetric indefinite matrix.

       Purpose:

	       DLA_SYRCOND estimates the Skeel condition number of  op(A) * op2(C)
	       where op2 is determined by CMODE as follows
	       CMODE =	1    op2(C) = C
	       CMODE =	0    op2(C) = I
	       CMODE = -1    op2(C) = inv(C)
	       The Skeel condition number cond(A) = norminf( |inv(A)||A| )
	       is computed by computing scaling factors R such that
	       diag(R)*A*op2(C) is row equilibrated and computing the standard
	       infinity-norm condition number.

       Parameters:
	   UPLO

		     UPLO is CHARACTER*1
		  = 'U':  Upper triangle of A is stored;
		  = 'L':  Lower triangle of A is stored.

	   N

		     N is INTEGER
		The number of linear equations, i.e., the order of the
		matrix A.  N >= 0.

	   A

		     A is DOUBLE PRECISION array, dimension (LDA,N)
		On entry, the N-by-N matrix A.

	   LDA

		     LDA is INTEGER
		The leading dimension of the array A.  LDA >= max(1,N).

	   AF

		     AF is DOUBLE PRECISION array, dimension (LDAF,N)
		The block diagonal matrix D and the multipliers used to
		obtain the factor U or L as computed by DSYTRF.

	   LDAF

		     LDAF is INTEGER
		The leading dimension of the array AF.	LDAF >= max(1,N).

	   IPIV

		     IPIV is INTEGER array, dimension (N)
		Details of the interchanges and the block structure of D
		as determined by DSYTRF.

	   CMODE

		     CMODE is INTEGER
		Determines op2(C) in the formula op(A) * op2(C) as follows:
		CMODE =  1    op2(C) = C
		CMODE =  0    op2(C) = I
		CMODE = -1    op2(C) = inv(C)

	   C

		     C is DOUBLE PRECISION array, dimension (N)
		The vector C in the formula op(A) * op2(C).

	   INFO

		     INFO is INTEGER
		  = 0:	Successful exit.
		i > 0:	The ith argument is invalid.

	   WORK

		     WORK is DOUBLE PRECISION array, dimension (3*N).
		Workspace.

	   IWORK

		     IWORK is INTEGER array, dimension (N).
		Workspace.

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   September 2012

       Definition at line 147 of file dla_syrcond.f.

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

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


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