Rami Ayoush, D.M. Stolyarov, Michal Wojciechowski
We introduce new spaces of martingales that behave like L1-based Sobolev spaces on Rd. We prove a martingale analog of Van Schaftingen’s theorem and give sharp estimates on the lower Hausdorff dimension of the terminal distributions of these martingales. We also provide martingale analogs of trace theorems for Sobolev functions.
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