dgetrs(3) [centos man page]

dgetrs.f(3)							      LAPACK							       dgetrs.f(3)

NAME

       dgetrs.f -

SYNOPSIS

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

Function/Subroutine Documentation
   subroutine dgetrs (characterTRANS, integerN, integerNRHS, double precision, dimension( lda, * )A, integerLDA, integer, dimension( * )IPIV,
       double precision, dimension( ldb, * )B, integerLDB, integerINFO)
       DGETRS

       Purpose:

	    DGETRS 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 DGETRF.

       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 DOUBLE PRECISION array, dimension (LDA,N)
		     The factors L and U from the factorization A = P*L*U
		     as computed by DGETRF.

	   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 DGETRF; for 1<=i<=N, row i of the
		     matrix was interchanged with row IPIV(i).

	   B

		     B is DOUBLE PRECISION 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 dgetrs.f.

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

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

Check Out this Related Man Page

DGETRS(l)								 )								 DGETRS(l)

NAME

       DGETRS  -  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
       DGETRF

SYNOPSIS

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

	   CHARACTER	  TRANS

	   INTEGER	  INFO, LDA, LDB, N, NRHS

	   INTEGER	  IPIV( * )

	   DOUBLE	  PRECISION A( LDA, * ), B( LDB, * )

PURPOSE

       DGETRS 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
       DGETRF.

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) DOUBLE PRECISION array, dimension (LDA,N)
	       The factors L and U from the factorization A = P*L*U as computed by DGETRF.

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

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

       B       (input/output) DOUBLE PRECISION 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 							 DGETRS(l)

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dgetrs(3) [centos man page]

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