English

Davie's type uniqueness for a class of SDEs with jumps

Probability 2016-12-19 v2 Dynamical Systems

Abstract

A result of A.M. Davie [Int. Math. Res. Not. 2007] states that a multidimensional stochastic equation dXt=b(t,Xt)dt+dWtdX_t = b(t, X_t)\,dt + dW_t, X0=xX_0=x, driven by a Wiener process W=(Wt)W= (W_t) with a coefficient bb which is only bounded and measurable has a unique solution for almost all choices of the driving Brownian path. We consider a similar problem when WW is replaced by a L\'evy process L=(Lt)L= (L_t) and bb is β\beta-H\"older continuous in the space variable, β(0,1) \beta \in (0,1). We assume that L1L_1 has a finite moment of order θ\theta, for some θ>0{\theta}>0. Using also a new c\`adl\`ag regularity result for strong solutions, we prove that strong existence and uniqueness for the SDE together with LpL^p-Lipschitz continuity of the strong solution with respect to xx imply a Davie's type uniqueness result for almost all choices of the L\'evy paths. We apply this result to a class of SDEs driven by non-degenerate α\alpha-stable L\'evy processes, α(0,2)\alpha \in (0,2) and β>1α/2\beta > 1 - \alpha/2.

Keywords

Cite

@article{arxiv.1509.07448,
  title  = {Davie's type uniqueness for a class of SDEs with jumps},
  author = {Enrico Priola},
  journal= {arXiv preprint arXiv:1509.07448},
  year   = {2016}
}

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