sgetrs.f(3) [centos man page]

sgetrs.f(3)							      LAPACK							       sgetrs.f(3)

NAME

       sgetrs.f -

SYNOPSIS

   Functions/Subroutines
       subroutine sgetrs (TRANS, N, NRHS, A, LDA, IPIV, B, LDB, INFO)
	   SGETRS

Function/Subroutine Documentation
   subroutine sgetrs (characterTRANS, integerN, integerNRHS, real, dimension( lda, * )A, integerLDA, integer, dimension( * )IPIV, real, dimension(
       ldb, * )B, integerLDB, integerINFO)
       SGETRS

       Purpose:

	    SGETRS solves a system of linear equations
	       A * X = B  or  A**T * X = B
	    with a general N-by-N matrix A using the LU factorization computed
	    by SGETRF.

       Parameters:
	   TRANS

		     TRANS is CHARACTER*1
		     Specifies the form of the system of equations:
		     = 'N':  A * X = B	(No transpose)
		     = 'T':  A**T* X = B  (Transpose)
		     = 'C':  A**T* X = B  (Conjugate transpose = Transpose)

	   N

		     N is INTEGER
		     The order of the matrix A.  N >= 0.

	   NRHS

		     NRHS is INTEGER
		     The number of right hand sides, i.e., the number of columns
		     of the matrix B.  NRHS >= 0.

	   A

		     A is REAL array, dimension (LDA,N)
		     The factors L and U from the factorization A = P*L*U
		     as computed by SGETRF.

	   LDA

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

	   IPIV

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

	   B

		     B is REAL array, dimension (LDB,NRHS)
		     On entry, the right hand side matrix B.
		     On exit, the solution matrix X.

	   LDB

		     LDB is INTEGER
		     The leading dimension of the array B.  LDB >= max(1,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 122 of file sgetrs.f.

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

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

Check Out this Related Man Page

SGETRS(l)								 )								 SGETRS(l)

NAME

       SGETRS  -  solve a system of linear equations A * X = B or A' * X = B with a general N-by-N matrix A using the LU factorization computed by
       SGETRF

SYNOPSIS

       SUBROUTINE SGETRS( TRANS, N, NRHS, A, LDA, IPIV, B, LDB, INFO )

	   CHARACTER	  TRANS

	   INTEGER	  INFO, LDA, LDB, N, NRHS

	   INTEGER	  IPIV( * )

	   REAL 	  A( LDA, * ), B( LDB, * )

PURPOSE

       SGETRS solves a system of linear equations A * X = B or A' * X = B with a general N-by-N matrix A using the LU  factorization  computed	by
       SGETRF.

ARGUMENTS

       TRANS   (input) CHARACTER*1
	       Specifies the form of the system of equations:
	       = 'N':  A * X = B  (No transpose)
	       = 'T':  A'* X = B  (Transpose)
	       = 'C':  A'* X = B  (Conjugate transpose = Transpose)

       N       (input) INTEGER
	       The order of the matrix A.  N >= 0.

       NRHS    (input) INTEGER
	       The number of right hand sides, i.e., the number of columns of the matrix B.  NRHS >= 0.

       A       (input) REAL array, dimension (LDA,N)
	       The factors L and U from the factorization A = P*L*U as computed by SGETRF.

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

       IPIV    (input) INTEGER array, dimension (N)
	       The pivot indices from SGETRF; for 1<=i<=N, row i of the matrix was interchanged with row IPIV(i).

       B       (input/output) REAL array, dimension (LDB,NRHS)
	       On entry, the right hand side matrix B.	On exit, the solution matrix X.

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

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

LAPACK version 3.0						   15 June 2000 							 SGETRS(l)

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sgetrs.f(3) [centos man page]

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