“…We obtain a separable Hilbert space (D(A r ), ·, · D(A r ) , · D(A r ) ) by setting ·, · D(A r ) := A r ·, A r · . For more details for the set up above, see for example [12,21,25,29]. Let (Ω, F , P) be a probability space equipped with a filtration satisfying the usual conditions.…”