cgetrs.f man page

cgetrs.f

Synopsis

Functions/Subroutines

subroutine cgetrs (TRANS, N, NRHS, A, LDA, IPIV, B, LDB, INFO)
CGETRS

Function/Subroutine Documentation

subroutine cgetrs (character TRANS, integer N, integer NRHS, complex, dimension( lda, * ) A, integer LDA, integer, dimension( * ) IPIV, complex, dimension( ldb, * ) B, integer LDB, integer INFO)

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:

December 2016

Definition at line 123 of file cgetrs.f.

Author

Generated automatically by Doxygen for LAPACK from the source code.

Referenced By

The man page cgetrs(3) is an alias of cgetrs.f(3).

Tue Nov 14 2017 Version 3.8.0 LAPACK