Provided by: liblapack-doc_3.3.1-1_all bug

NAME

       LAPACK-3  - solves one of the systems of equations  A * X = B, A**T * X = B, or A**H * X =
       B,

SYNOPSIS

       SUBROUTINE ZGTTRS( TRANS, N, NRHS, DL, D, DU, DU2, IPIV, B, LDB, INFO )

           CHARACTER      TRANS

           INTEGER        INFO, LDB, N, NRHS

           INTEGER        IPIV( * )

           COMPLEX*16     B( LDB, * ), D( * ), DL( * ), DU( * ), DU2( * )

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.

ARGUMENTS

        TRANS   (input) 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       (input) INTEGER
                The order of the matrix A.

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

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

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

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

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

        IPIV    (input) 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       (input/output) 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     (input) INTEGER
                The leading dimension of the array B.  LDB >= max(1,N).

        INFO    (output) INTEGER
                = 0:  successful exit
                < 0:  if INFO = -k, the k-th argument had an illegal value

 LAPACK routine (version 3.2)               April 2011                            ZGTTRS(3lapack)