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

NAME
       SRC/spttrs.f

SYNOPSIS
   Functions/Subroutines
       subroutine spttrs (n, nrhs, d, e, b, ldb, info)
           SPTTRS

Function/Subroutine Documentation
   subroutine spttrs (integer n, integer nrhs, real, dimension( * ) d, real,
       dimension( * ) e, real, dimension( ldb, * ) b, integer ldb, integer
       info)
       SPTTRS

       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.
           !>

       Parameters
           N

           !>          N is INTEGER
           !>          The order of the tridiagonal matrix A.  N >= 0.
           !>

           NRHS

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

           D

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

           E

           !>          E is 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

           !>          B is 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

           !>          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 108 of file spttrs.f.

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

LAPACK                          Version 3.12.0                 SRC/spttrs.f(3)