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

NAME

       LAPACK-3 - converts A given by ZHETRF into L and D or vice-versa

SYNOPSIS

       SUBROUTINE ZSYCONV( UPLO, WAY, N, A, LDA, IPIV, WORK, INFO )

           CHARACTER       UPLO, WAY

           INTEGER         INFO, LDA, N

           INTEGER         IPIV( * )

           DOUBLE          COMPLEX A( LDA, * ), WORK( * )

PURPOSE

       ZSYCONV converts A given by ZHETRF into L and D or vice-versa.
        Get nondiagonal elements of D (returned in workspace) and
        apply or reverse permutation done in TRF.

ARGUMENTS

        UPLO    (input) CHARACTER*1
                Specifies whether the details of the factorization are stored
                as an upper or lower triangular matrix.
                = 'U':  Upper triangular, form is A = U*D*U**T;
                = 'L':  Lower triangular, form is A = L*D*L**T.

        WAY     (input) CHARACTER*1
                = 'C': Convert
                = 'R': Revert

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

        A       (input) DOUBLE COMPLEX array, dimension (LDA,N)
                The block diagonal matrix D and the multipliers used to
                obtain the factor U or L as computed by ZSYTRF.

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

        IPIV    (input) INTEGER array, dimension (N)
                Details of the interchanges and the block structure of D
                as determined by ZSYTRF.
                The length of WORK.  LWORK >=1.
                LWORK = N
                If LWORK = -1, then a workspace query is assumed; the routine
                only calculates the optimal size of the WORK array, returns
                this value as the first entry of the WORK array, and no error
                message related to LWORK is issued by XERBLA.

        INFO    (output) INTEGER
                = 0:  successful exit
                < 0:  if INFO = -i, the i-th argument had an illegal value

 LAPACK PROTOTYPE routine (version 3.2.2)   April 2011                           ZSYCONV(3lapack)