[formula omitted]-convergence of Picard’s successive approximations to solutions of stochastic differential equations.

In this paper, we prove that for a stochastic differential equation with the coefficients of class C ∞ , the successive approximations of Picard converge in the C ∞ -sense, which implies that the solution to stochastic differential equation is of class C ∞ in the initial value x almost surely. [ABSTRACT FROM AUTHOR]