Home Man
Search
Today's Posts
Register

Linux & Unix Commands - Search Man Pages

CentOS 7.0 - man page for dpocon.f (centos section 3)

dpocon.f(3)				      LAPACK				      dpocon.f(3)

NAME
       dpocon.f -

SYNOPSIS
   Functions/Subroutines
       subroutine dpocon (UPLO, N, A, LDA, ANORM, RCOND, WORK, IWORK, INFO)
	   DPOCON

Function/Subroutine Documentation
   subroutine dpocon (characterUPLO, integerN, double precision, dimension( lda, * )A,
       integerLDA, double precisionANORM, double precisionRCOND, double precision, dimension( *
       )WORK, integer, dimension( * )IWORK, integerINFO)
       DPOCON

       Purpose:

	    DPOCON estimates the reciprocal of the condition number (in the
	    1-norm) of a real symmetric positive definite matrix using the
	    Cholesky factorization A = U**T*U or A = L*L**T computed by DPOTRF.

	    An estimate is obtained for norm(inv(A)), and the reciprocal of the
	    condition number is computed as RCOND = 1 / (ANORM * norm(inv(A))).

       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 order of the matrix A.  N >= 0.

	   A

		     A is DOUBLE PRECISION array, dimension (LDA,N)
		     The triangular factor U or L from the Cholesky factorization
		     A = U**T*U or A = L*L**T, as computed by DPOTRF.

	   LDA

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

	   ANORM

		     ANORM is DOUBLE PRECISION
		     The 1-norm (or infinity-norm) of the symmetric matrix A.

	   RCOND

		     RCOND is DOUBLE PRECISION
		     The reciprocal of the condition number of the matrix A,
		     computed as RCOND = 1/(ANORM * AINVNM), where AINVNM is an
		     estimate of the 1-norm of inv(A) computed in this routine.

	   WORK

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

	   IWORK

		     IWORK is INTEGER array, dimension (N)

	   INFO

		     INFO is INTEGER
		     = 0:  successful exit
		     < 0:  if INFO = -i, the i-th argument had an illegal value

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   November 2011

       Definition at line 121 of file dpocon.f.

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

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


All times are GMT -4. The time now is 05:08 AM.

Unix & Linux Forums Content Copyrightę1993-2018. All Rights Reserved.
UNIX.COM Login
Username:
Password:  
Show Password