dgesc2(l) [redhat man page]

DGESC2(l)								 )								 DGESC2(l)

NAME

       DGESC2  -  solve  a system of linear equations  A * X = scale* RHS  with a general N-by-N matrix A using the LU factorization with complete
       pivoting computed by DGETC2

SYNOPSIS

       SUBROUTINE DGESC2( N, A, LDA, RHS, IPIV, JPIV, SCALE )

	   INTEGER	  LDA, N

	   DOUBLE	  PRECISION SCALE

	   INTEGER	  IPIV( * ), JPIV( * )

	   DOUBLE	  PRECISION A( LDA, * ), RHS( * )

PURPOSE

       DGESC2 solves a system of linear equations A * X = scale* RHS with a general N-by-N matrix A using the LU factorization with complete  piv-
       oting computed by DGETC2.

ARGUMENTS

       N       (input) INTEGER
	       The order of the matrix A.

       A       (input) DOUBLE PRECISION array, dimension (LDA,N)
	       On entry, the  LU part of the factorization of the n-by-n matrix A computed by DGETC2:  A = P * L * U * Q

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

       RHS     (input/output) DOUBLE PRECISION array, dimension (N).
	       On entry, the right hand side vector b.	On exit, the solution vector X.

       IPIV    (iput) INTEGER array, dimension (N).
	       The pivot indices; for 1 <= i <= N, row i of the matrix has been interchanged with row IPIV(i).

       JPIV    (iput) INTEGER array, dimension (N).
	       The pivot indices; for 1 <= j <= N, column j of the matrix has been interchanged with column JPIV(j).

       SCALE	(output) DOUBLE PRECISION
		On exit, SCALE contains the scale factor. SCALE is chosen 0 <= SCALE <= 1 to prevent owerflow in the solution.

FURTHER DETAILS

       Based on contributions by
	  Bo Kagstrom and Peter Poromaa, Department of Computing Science,
	  Umea University, S-901 87 Umea, Sweden.

LAPACK version 3.0						   15 June 2000 							 DGESC2(l)

dgesc2.f(3)							      LAPACK							       dgesc2.f(3)

NAME

       dgesc2.f -

SYNOPSIS

   Functions/Subroutines
       subroutine dgesc2 (N, A, LDA, RHS, IPIV, JPIV, SCALE)
	   DGESC2

Function/Subroutine Documentation
   subroutine dgesc2 (integerN, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( * )RHS, integer, dimension( *
       )IPIV, integer, dimension( * )JPIV, double precisionSCALE)
       DGESC2

       Purpose:

	    DGESC2 solves a system of linear equations

		      A * X = scale* RHS

	    with a general N-by-N matrix A using the LU factorization with
	    complete pivoting computed by DGETC2.

       Parameters:
	   N

		     N is INTEGER
		     The order of the matrix A.

	   A

		     A is DOUBLE PRECISION array, dimension (LDA,N)
		     On entry, the  LU part of the factorization of the n-by-n
		     matrix A computed by DGETC2:  A = P * L * U * Q

	   LDA

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

	   RHS

		     RHS is DOUBLE PRECISION array, dimension (N).
		     On entry, the right hand side vector b.
		     On exit, the solution vector X.

	   IPIV

		     IPIV is INTEGER array, dimension (N).
		     The pivot indices; for 1 <= i <= N, row i of the
		     matrix has been interchanged with row IPIV(i).

	   JPIV

		     JPIV is INTEGER array, dimension (N).
		     The pivot indices; for 1 <= j <= N, column j of the
		     matrix has been interchanged with column JPIV(j).

	   SCALE

		     SCALE is DOUBLE PRECISION
		     On exit, SCALE contains the scale factor. SCALE is chosen
		     0 <= SCALE <= 1 to prevent owerflow in the solution.

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   November 2011

       Contributors:
	   Bo Kagstrom and Peter Poromaa, Department of Computing Science, Umea University, S-901 87 Umea, Sweden.

       Definition at line 115 of file dgesc2.f.

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

Version 3.4.1							  Sun May 26 2013						       dgesc2.f(3)