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

NAME

       LAPACK-3  -  solves  a  tridiagonal  system  of  the  form   A  * X = B using the L*D*L**T
       factorization of A computed by SPTTRF

SYNOPSIS

       SUBROUTINE SPTTRS( N, NRHS, D, E, B, LDB, INFO )

           INTEGER        INFO, LDB, N, NRHS

           REAL           B( LDB, * ), D( * ), E( * )

PURPOSE

       SPTTRS solves a tridiagonal system of the form
          A * X = B using the L*D*L**T factorization of A computed by SPTTRF.  D is a
        diagonal matrix specified in the vector D, L is a unit bidiagonal
        matrix whose subdiagonal is specified in the vector E, and X and B
        are N by NRHS matrices.

ARGUMENTS

        N       (input) INTEGER
                The order of the tridiagonal matrix A.  N >= 0.

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

        D       (input) REAL array, dimension (N)
                The n diagonal elements of the diagonal matrix D from the
                L*D*L**T factorization of A.

        E       (input) REAL array, dimension (N-1)
                The (n-1) subdiagonal elements of the unit bidiagonal factor
                L from the L*D*L**T factorization of A.  E can also be regarded
                as the superdiagonal of the unit bidiagonal factor U from the
                factorization A = U**T*D*U.

        B       (input/output) REAL array, dimension (LDB,NRHS)
                On entry, the right hand side vectors B for the system of
                linear equations.
                On exit, 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 3.3.1)             April 2011                            SPTTRS(3lapack)