- dsymv:: ORDER * UPLO * N * ALPHA * A * X * BETA * Y [LDA * INCX * INCY] -> F64VECTOR procedure
xSYMV performs matrix-vector multiply-add operation of the form y := alpha*A*x + beta*y.
ALPHA and BETA are scalars, and A is an N x N symmetric matrix.
X and Y are N element vectors.