Space-Distribution PDEs for Path Independent Additive Functionals of McKean-Vlasov SDEs

Let P2(Rd) be the space of probability measures on Rd with finite second moment. The path independence of additive functionals of McKean-Vlasov SDEs is characterized by PDEs on the product space RdP2(Rd) equipped with the usual derivative in space variable and Lions derivative in distribution. These PDEs are solved by using probabilis- tic arguments developed from [2]. In particular, the path independence of the Girsanov transformation killing the drift term is identified with a nonlinear PDE on RdP2(Rd), which includes corresponding results derived earlier for the classical SDEs as special situations.