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

NAME

       LAPACK-3  -  computes  the  Cholesky  factorization  of a real symmetric positive definite
       matrix A

SYNOPSIS

       SUBROUTINE DPOTRF( UPLO, N, A, LDA, INFO )

           CHARACTER      UPLO

           INTEGER        INFO, LDA, N

           DOUBLE         PRECISION A( LDA, * )

PURPOSE

       DPOTRF computes the Cholesky factorization of a real symmetric positive definite matrix A.
        The factorization has the form
           A = U**T * U,  if UPLO = 'U', or
           A = L  * L**T,  if UPLO = 'L',
        where U is an upper triangular matrix and L is lower triangular.
        This is the block version of the algorithm, calling Level 3 BLAS.

ARGUMENTS

        UPLO    (input) CHARACTER*1
                = 'U':  Upper triangle of A is stored;
                = 'L':  Lower triangle of A is stored.

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

        A       (input/output) DOUBLE PRECISION array, dimension (LDA,N)
                On entry, the symmetric 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**T*U or A = L*L**T.

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

        INFO    (output) INTEGER
                = 0:  successful exit
                < 0:  if INFO = -i, the i-th argument had an illegal value
                > 0:  if INFO = i, the leading minor of order i is not
                positive definite, and the factorization could not be
                completed.

 LAPACK routine (version 3.3.1)             April 2011                            DPOTRF(3lapack)