 Bell (2006)) consider "H" to be a densely embedded Hilbert subspace of the Banach space "E", with "i" simply the inclusion of "H" into "E".There is no loss of generality in taking this "embedded spaces" viewpoint instead of the "different spaces" viewpoint given above.Arguably the most frequently-used abstract Wiener space is the space of continuous paths, and is known as classical Wiener space.