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

NAME
       SRC/zptsv.f

SYNOPSIS
   Functions/Subroutines
       subroutine zptsv (n, nrhs, d, e, b, ldb, info)
            ZPTSV computes the solution to system of linear equations A * X =
           B for PT matrices

Function/Subroutine Documentation
   subroutine zptsv (integer n, integer nrhs, double precision, dimension( * )
       d, complex*16, dimension( * ) e, complex*16, dimension( ldb, * ) b,
       integer ldb, integer info)
        ZPTSV computes the solution to system of linear equations A * X = B
       for PT matrices

       Purpose:


           !>
           !> ZPTSV computes the solution to a complex system of linear equations
           !> A*X = B, where A is an N-by-N Hermitian positive definite tridiagonal
           !> matrix, and X and B are N-by-NRHS matrices.
           !>
           !> A is factored as A = L*D*L**H, and the factored form of A is then
           !> used to solve the system of equations.
           !>

       Parameters
           N

           !>          N is INTEGER
           !>          The order of the 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 DOUBLE PRECISION array, dimension (N)
           !>          On entry, the n diagonal elements of the tridiagonal matrix
           !>          A.  On exit, the n diagonal elements of the diagonal matrix
           !>          D from the factorization A = L*D*L**H.
           !>

           E

           !>          E is COMPLEX*16 array, dimension (N-1)
           !>          On entry, the (n-1) subdiagonal elements of the tridiagonal
           !>          matrix A.  On exit, the (n-1) subdiagonal elements of the
           !>          unit bidiagonal factor L from the L*D*L**H factorization of
           !>          A.  E can also be regarded as the superdiagonal of the unit
           !>          bidiagonal factor U from the U**H*D*U factorization of A.
           !>

           B

           !>          B is COMPLEX*16 array, dimension (LDB,NRHS)
           !>          On entry, the N-by-NRHS right hand side matrix B.
           !>          On exit, if INFO = 0, the N-by-NRHS solution matrix 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 = -i, the i-th argument had an illegal value
           !>          > 0:  if INFO = i, the leading principal minor of order i
           !>                is not positive, and the solution has not been
           !>                computed.  The factorization has not been completed
           !>                unless i = N.
           !>

       Author
           Univ. of Tennessee


           Univ. of California Berkeley


           Univ. of Colorado Denver


           NAG Ltd.

       Definition at line 114 of file zptsv.f.

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

LAPACK                          Version 3.12.0                  SRC/zptsv.f(3)