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

NAME
       SRC/zpttrf.f

SYNOPSIS
   Functions/Subroutines
       subroutine zpttrf (n, d, e, info)
           ZPTTRF

Function/Subroutine Documentation
   subroutine zpttrf (integer n, double precision, dimension( * ) d,
       complex*16, dimension( * ) e, integer info)
       ZPTTRF

       Purpose:


           !>
           !> ZPTTRF computes the L*D*L**H factorization of a complex Hermitian
           !> positive definite tridiagonal matrix A.  The factorization may also
           !> be regarded as having the form A = U**H *D*U.
           !>

       Parameters
           N

           !>          N is INTEGER
           !>          The order of the matrix A.  N >= 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 L*D*L**H factorization of A.
           !>

           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.
           !>

           INFO

           !>          INFO is INTEGER
           !>          = 0: successful exit
           !>          < 0: if INFO = -k, the k-th argument had an illegal value
           !>          > 0: if INFO = k, the leading principal minor of order k
           !>               is not positive; if k < N, the factorization could not
           !>               be completed, while if k = N, the factorization was
           !>               completed, but D(N) <= 0.
           !>

       Author
           Univ. of Tennessee


           Univ. of California Berkeley


           Univ. of Colorado Denver


           NAG Ltd.

       Definition at line 91 of file zpttrf.f.

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

LAPACK                          Version 3.12.0                 SRC/zpttrf.f(3)