SRC/zgtts2.f(3)            Library Functions Manual            SRC/zgtts2.f(3)

NAME
       SRC/zgtts2.f

SYNOPSIS
   Functions/Subroutines
       subroutine zgtts2 (itrans, n, nrhs, dl, d, du, du2, ipiv, b, ldb)
           ZGTTS2 solves a system of linear equations with a tridiagonal
           matrix using the LU factorization computed by sgttrf.

Function/Subroutine Documentation
   subroutine zgtts2 (integer itrans, 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)
       ZGTTS2 solves a system of linear equations with a tridiagonal matrix
       using the LU factorization computed by sgttrf.

       Purpose:


           !>
           !> ZGTTS2 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
           ITRANS

           !>          ITRANS is INTEGER
           !>          Specifies the form of the system of equations.
           !>          = 0:  A * X = B     (No transpose)
           !>          = 1:  A**T * X = B  (Transpose)
           !>          = 2:  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).
           !>

       Author
           Univ. of Tennessee


           Univ. of California Berkeley


           Univ. of Colorado Denver


           NAG Ltd.

       Definition at line 127 of file zgtts2.f.

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

LAPACK                          Version 3.12.0                 SRC/zgtts2.f(3)