cgetrs.f(3)

NAME
cgetrs.f -

SYNOPSIS

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

Function/Subroutine Documentation

  subroutine CGETRS (CHARACTERTRANS, INTEGERN, INTEGERNRHS, COMPLEX, dimension( lda, * )A, INTEGERLDA, INTEGER, dimension( * )IPIV, COMPLEX, dimension( ldb, * )B, INTEGERLDB, INTEGERINFO)

CGETRS

Purpose:

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

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**H * X = B  (Conjugate 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 COMPLEX array, dimension (LDA,N)
              The factors L and U from the factorization A = P*L*U
              as computed by CGETRF.

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

    B

              B is COMPLEX 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 cgetrs.f'.

Author

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