Differential and stochastic equations in abstract Wiener space

This paper studies the differential equation $\text{(}\text{?}\text{?t}\text{) u(t, x) =}\text{1}\text{2}\text{trace}\text{A(t, x) D}{}^2\text{u(t, x) A}{}^1\text{(t, x) + 〈σ(t, x), Du(t, x)〉 ? V(x) u(t, x), u(0, x) = φ(x)}$ in infinite dimensional space. A Kac's type representation of solution in terms of function space integral is proved. Kac's method is modified to work nicely regardless of the dimensionality.