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Rough path limits of the Wong-Zakai type with a modified drift term. (English) Zbl 1169.60011

Authors’ abstract: “The Wong–Zakai theorem asserts that ODEs driven by “reasonable” (e.g. piecewise linear) approximations of Brownian motion converge to the corresponding Stratonovich stochastic differential equation. With the aid of rough path analysis, we study “non-reasonable” approximations and go beyond a well-known criterion of N. Ikeda and S. H. Watanabe [Stochastic differential equations and diffusion processes. 2nd ed. North Holland (1989; Zbl 0684.60040)] in the sense that our result applies to perturbations on all levels, exhibiting additional drift terms involving any iterated Lie brackets of the driving vector fields. In particular, this applies to the approximations by E. J. McShane [Proc. 6th Berkeley Sympos. math. Statist. Probab., Univ. Calif. 1970, No. 3, 263–294 (1972; Zbl 0283.60061)] and H. Sussmann [Stochastic analysis, Proc. Conf. Honor Moshe Zakai 65th Birthday, Haifa/Isr. 1991, 475-493 (1991; Zbl 0733.60082)]. Our approach is not restricted to Brownian driving signals. At last, these ideas can be used to prove optimality of certain rough path estimates.”

MSC:

60H10 Stochastic ordinary differential equations (aspects of stochastic analysis)
60J25 Continuous-time Markov processes on general state spaces
60J60 Diffusion processes
34F05 Ordinary differential equations and systems with randomness

References:

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