“…Now, as a PC Galerkin approximation of , as is discussed in Hou et al and Kalpinelli et al and references therein, we seek a solution , for t ∈ [0, T ] and γ as is given in Theorem , in the following form where the , , satisfies the following estimate in which where m j and n are introduced in and , respectively. The coupled and deterministic propagators are obtained through the Galerkin projection upon substituting the approximations , into the governing equation .…”