EN
Let D be an open convex set in $ℝ^d$ and let F be a Lipschitz operator defined on the space of adapted càdlàg processes. We show that for any adapted process H and any semimartingale Z there exists a unique strong solution of the following stochastic differential equation (SDE) with reflection on the boundary of D:
$X_t = H_t + ∫_0^t ⟨F(X)_{s-},dZ_s⟩ + K_t$, t ∈ ℝ⁺.
Our proofs are based on new a priori estimates for solutions of the deterministic Skorokhod problem.