sgesc2(l) [redhat man page]

SGESC2(l)								 )								 SGESC2(l)

NAME

       SGESC2  -  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 SGETC2

SYNOPSIS

       SUBROUTINE SGESC2( N, A, LDA, RHS, IPIV, JPIV, SCALE )

	   INTEGER	  LDA, N

	   REAL 	  SCALE

	   INTEGER	  IPIV( * ), JPIV( * )

	   REAL 	  A( LDA, * ), RHS( * )

PURPOSE

       SGESC2 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 SGETC2.

ARGUMENTS

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

       A       (input) REAL array, dimension (LDA,N)
	       On entry, the  LU part of the factorization of the n-by-n matrix A computed by SGETC2:  A = P * L * U * Q

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

       RHS     (input/output) REAL 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) REAL
		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 							 SGESC2(l)

sgesc2.f(3)							      LAPACK							       sgesc2.f(3)

NAME

       sgesc2.f -

SYNOPSIS

   Functions/Subroutines
       subroutine sgesc2 (N, A, LDA, RHS, IPIV, JPIV, SCALE)
	   SGESC2

Function/Subroutine Documentation
   subroutine sgesc2 (integerN, real, dimension( lda, * )A, integerLDA, real, dimension( * )RHS, integer, dimension( * )IPIV, integer, dimension(
       * )JPIV, realSCALE)
       SGESC2

       Purpose:

	    SGESC2 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 SGETC2.

       Parameters:
	   N

		     N is INTEGER
		     The order of the matrix A.

	   A

		     A is REAL array, dimension (LDA,N)
		     On entry, the  LU part of the factorization of the n-by-n
		     matrix A computed by SGETC2:  A = P * L * U * Q

	   LDA

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

	   RHS

		     RHS is REAL 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 REAL
		      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 sgesc2.f.

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

Version 3.4.1							  Sun May 26 2013						       sgesc2.f(3)