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

NAME
       SRC/zgttrs.f

SYNOPSIS
   Functions/Subroutines
       subroutine zgttrs (trans, n, nrhs, dl, d, du, du2, ipiv, b, ldb, info)
           ZGTTRS

Function/Subroutine Documentation
   subroutine zgttrs (character trans, integer n, integer nrhs, complex*16,
       dimension( * ) dl, complex*16, dimension( * ) d, complex*16, dimension(
       * ) du, complex*16, dimension( * ) du2, integer, dimension( * ) ipiv,
       complex*16, dimension( ldb, * ) b, integer ldb, integer info)
       ZGTTRS

       Purpose:


           !>
           !> ZGTTRS solves one of the systems of equations
           !>    A * X = B,  A**T * X = B,  or  A**H * X = B,
           !> with a tridiagonal matrix A using the LU factorization computed
           !> by ZGTTRF.
           !>

       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.
           !>

           NRHS

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

           DL

           !>          DL is COMPLEX*16 array, dimension (N-1)
           !>          The (n-1) multipliers that define the matrix L from the
           !>          LU factorization of A.
           !>

           D

           !>          D is COMPLEX*16 array, dimension (N)
           !>          The n diagonal elements of the upper triangular matrix U from
           !>          the LU factorization of A.
           !>

           DU

           !>          DU is COMPLEX*16 array, dimension (N-1)
           !>          The (n-1) elements of the first super-diagonal of U.
           !>

           DU2

           !>          DU2 is COMPLEX*16 array, dimension (N-2)
           !>          The (n-2) elements of the second super-diagonal of U.
           !>

           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).  IPIV(i) will always be either
           !>          i or i+1; IPIV(i) = i indicates a row interchange was not
           !>          required.
           !>

           B

           !>          B is COMPLEX*16 array, dimension (LDB,NRHS)
           !>          On entry, the matrix of right hand side vectors B.
           !>          On exit, B is overwritten by the solution vectors 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 = -k, the k-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 zgttrs.f.

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

LAPACK                          Version 3.12.0                 SRC/zgttrs.f(3)