Abstract
We construct a series of stochastic differential equations of the form which exhibit nonuniqueness in the path-by-path sense while having a unique adapted solution in the sense of stochastic processes, i.e. pathwise uniqueness holds.
Nous construisons une série d’équations différentielles stochastiques de la forme qui présentent non-unicité au sens chemin-par-chemin tout en ayant une solution adaptée unique au sens des processus stochastiques.
Funding Statement
This research was supported by the Russian Science Foundation Grant 17-11-01058 at Lomonosov Moscow State University. (The results presented in Section 3.)
The work of A.V. Shaposhnikov was performed at the Steklov International Mathematical Center and supported by the Ministry of Science and Higher Education of the Russian Federation (agreement no. 075-15-2019-1614).
Acknowledgements
The authors would like to thank V.I. Bogachev, M. Röckner and L. Mytnik for some fruitful discussions and the anonymous referee for the thorough reading and corrections which have greatly helped improve the manuscript.
Citation
Alexander Shaposhnikov. Lukas Wresch. "Pathwise vs. path-by-path uniqueness." Ann. Inst. H. Poincaré Probab. Statist. 58 (3) 1640 - 1649, August 2022. https://doi.org/10.1214/21-AIHP1187
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