SRC/zpotf2.f(3)            Library Functions Manual            SRC/zpotf2.f(3)

NAME
       SRC/zpotf2.f

SYNOPSIS
   Functions/Subroutines
       subroutine zpotf2 (uplo, n, a, lda, info)
           ZPOTF2 computes the Cholesky factorization of a symmetric/Hermitian
           positive definite matrix (unblocked algorithm).

Function/Subroutine Documentation
   subroutine zpotf2 (character uplo, integer n, complex*16, dimension( lda, *
       ) a, integer lda, integer info)
       ZPOTF2 computes the Cholesky factorization of a symmetric/Hermitian
       positive definite matrix (unblocked algorithm).

       Purpose:


            ZPOTF2 computes the Cholesky factorization of a complex Hermitian
            positive definite matrix A.

            The factorization has the form
               A = U**H * U ,  if UPLO = 'U', or
               A = L  * L**H,  if UPLO = 'L',
            where U is an upper triangular matrix and L is lower triangular.

            This is the unblocked version of the algorithm, calling Level 2 BLAS.

       Parameters
           UPLO

                     UPLO is CHARACTER*1
                     Specifies whether the upper or lower triangular part of the
                     Hermitian matrix A is stored.
                     = 'U':  Upper triangular
                     = 'L':  Lower triangular

           N

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

           A

                     A is COMPLEX*16 array, dimension (LDA,N)
                     On entry, the Hermitian matrix A.  If UPLO = 'U', the leading
                     n by n upper triangular part of A contains the upper
                     triangular part of the matrix A, and the strictly lower
                     triangular part of A is not referenced.  If UPLO = 'L', the
                     leading n by n lower triangular part of A contains the lower
                     triangular part of the matrix A, and the strictly upper
                     triangular part of A is not referenced.

                     On exit, if INFO = 0, the factor U or L from the Cholesky
                     factorization A = U**H *U  or A = L*L**H.

           LDA

                     LDA is INTEGER
                     The leading dimension of the array A.  LDA >= max(1,N).

           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, and the factorization could not be
                          completed.

       Author
           Univ. of Tennessee

           Univ. of California Berkeley

           Univ. of Colorado Denver

           NAG Ltd.

       Definition at line 108 of file zpotf2.f.

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

LAPACK                          Version 3.12.0                 SRC/zpotf2.f(3)