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sla_porcond.f(3)			      LAPACK				 sla_porcond.f(3)

NAME
       sla_porcond.f -

SYNOPSIS
   Functions/Subroutines
       REAL function sla_porcond (UPLO, N, A, LDA, AF, LDAF, CMODE, C, INFO, WORK, IWORK)
	   SLA_PORCOND estimates the Skeel condition number for a symmetric positive-definite
	   matrix.

Function/Subroutine Documentation
   REAL function sla_porcond (characterUPLO, integerN, real, dimension( lda, * )A, integerLDA,
       real, dimension( ldaf, * )AF, integerLDAF, integerCMODE, real, dimension( * )C,
       integerINFO, real, dimension( * )WORK, integer, dimension( * )IWORK)
       SLA_PORCOND estimates the Skeel condition number for a symmetric positive-definite matrix.

       Purpose:

	       SLA_PORCOND 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 REAL 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 REAL array, dimension (LDAF,N)
		The triangular factor U or L from the Cholesky factorization
		A = U**T*U or A = L*L**T, as computed by SPOTRF.

	   LDAF

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

	   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 REAL 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 REAL 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 140 of file sla_porcond.f.

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

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