Approximations of Mckean-Vlasov SDEs with Irregular Coefficients

Abstract: The goal of this paper is to approximate several kinds of {\it Mckean-Vlasov SDEs} with {\it irregular coefficients} via weakly interacting particle systems. More precisely, propagation of chaos and convergence rate of Euler-Maruyama scheme associated with the consequent weakly interacting particle systems are investigated for Mckean-Vlasov SDEs, where (i) the diffusion terms are H\"older continuous by taking advantage of Yamada-Watanabe's approximation approach and (ii) the drifts are H\"older continuous by freezing distributions followed by invoking Zvonkin's transformation trick.