SRC/zgbtrs.f(3)            Library Functions Manual            SRC/zgbtrs.f(3)

NAME
       SRC/zgbtrs.f

SYNOPSIS
   Functions/Subroutines
       subroutine zgbtrs (trans, n, kl, ku, nrhs, ab, ldab, ipiv, b, ldb,
           info)
           ZGBTRS

Function/Subroutine Documentation
   subroutine zgbtrs (character trans, integer n, integer kl, integer ku,
       integer nrhs, complex*16, dimension( ldab, * ) ab, integer ldab,
       integer, dimension( * ) ipiv, complex*16, dimension( ldb, * ) b,
       integer ldb, integer info)
       ZGBTRS

       Purpose:


            ZGBTRS solves a system of linear equations
               A * X = B,  A**T * X = B,  or  A**H * X = B
            with a general band matrix A using the LU factorization computed
            by ZGBTRF.

       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.

           KL

                     KL is INTEGER
                     The number of subdiagonals within the band of A.  KL >= 0.

           KU

                     KU is INTEGER
                     The number of superdiagonals within the band of A.  KU >= 0.

           NRHS

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

           AB

                     AB is COMPLEX*16 array, dimension (LDAB,N)
                     Details of the LU factorization of the band matrix A, as
                     computed by ZGBTRF.  U is stored as an upper triangular band
                     matrix with KL+KU superdiagonals in rows 1 to KL+KU+1, and
                     the multipliers used during the factorization are stored in
                     rows KL+KU+2 to 2*KL+KU+1.

           LDAB

                     LDAB is INTEGER
                     The leading dimension of the array AB.  LDAB >= 2*KL+KU+1.

           IPIV

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

           B

                     B is COMPLEX*16 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.

       Definition at line 136 of file zgbtrs.f.

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

LAPACK                          Version 3.12.0                 SRC/zgbtrs.f(3)