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

NAME

       LAPACK-3 - performs the matrix-vector operation   y := alpha*A*x + beta*y,

SYNOPSIS

       SUBROUTINE ZSYMV( UPLO, N, ALPHA, A, LDA, X, INCX, BETA, Y, INCY )

           CHARACTER     UPLO

           INTEGER       INCX, INCY, LDA, N

           COMPLEX*16    ALPHA, BETA

           COMPLEX*16    A( LDA, * ), X( * ), Y( * )

PURPOSE

       ZSYMV  performs the matrix-vector  operation
        where alpha and beta are scalars, x and y are n element vectors and
        A is an n by n symmetric matrix.

ARGUMENTS

        UPLO     (input) CHARACTER*1
                 On entry, UPLO specifies whether the upper or lower
                 triangular part of the array A is to be referenced as
                 follows:
                 UPLO = 'U' or 'u'   Only the upper triangular part of A
                 is to be referenced.
                 UPLO = 'L' or 'l'   Only the lower triangular part of A
                 is to be referenced.
                 Unchanged on exit.

        N        (input) INTEGER
                 On entry, N specifies the order of the matrix A.
                 N must be at least zero.
                 Unchanged on exit.

        ALPHA    (input) COMPLEX*16
                 On entry, ALPHA specifies the scalar alpha.
                 Unchanged on exit.

        A        (input) COMPLEX*16 array, dimension ( LDA, N )
                 Before entry, with  UPLO = 'U' or 'u', the leading n by n
                 upper triangular part of the array A must contain the upper
                 triangular part of the symmetric matrix and the strictly
                 lower triangular part of A is not referenced.
                 Before entry, with UPLO = 'L' or 'l', the leading n by n
                 lower triangular part of the array A must contain the lower
                 triangular part of the symmetric matrix and the strictly
                 upper triangular part of A is not referenced.
                 Unchanged on exit.

        LDA      (input) INTEGER
                 On entry, LDA specifies the first dimension of A as declared
                 in the calling (sub) program. LDA must be at least
                 max( 1, N ).
                 Unchanged on exit.

        X        (input) COMPLEX*16 array, dimension at least
                 ( 1 + ( N - 1 )*abs( INCX ) ).
                 Before entry, the incremented array X must contain the N-
                 element vector x.
                 Unchanged on exit.

        INCX     (input) INTEGER
                 On entry, INCX specifies the increment for the elements of
                 X. INCX must not be zero.
                 Unchanged on exit.

        BETA     (input) COMPLEX*16
                 On entry, BETA specifies the scalar beta. When BETA is
                 supplied as zero then Y need not be set on input.
                 Unchanged on exit.

        Y        (input/output) COMPLEX*16 array, dimension at least
                 ( 1 + ( N - 1 )*abs( INCY ) ).
                 Before entry, the incremented array Y must contain the n
                 element vector y. On exit, Y is overwritten by the updated
                 vector y.

        INCY     (input) INTEGER
                 On entry, INCY specifies the increment for the elements of
                 Y. INCY must not be zero.
                 Unchanged on exit.

 LAPACK auxiliary routine (version 3.2)     April 2011                             ZSYMV(3lapack)