Abstract:
We study a class of $E_0$-semigroups of endomorphisms of a von Neumann factor $\mathscr M$ possessing the following property: an $e_0$-semigroup of endomorphisms of $\mathscr B(\mathscr H)$ , where $\mathscr H$ is the standard representation space for $\mathscr M$ , and a product system of Hilbert spaces can be associated with each of these $E_0$-semigroups.