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Simultaneous boundary hitting by coupled reflected Brownian motions
Krzysztof Burdzy · 2018-12-20 · via math.PR updates on arXiv.org

(i) Uncountably many synchronized reflected Brownian motions can hit the boundary of a $C^2$ domain at the same time. (ii) Measures associated to local times of two synchronized reflected Brownian motions are mutually singular until the time when the normal vectors at the reflection locations become identical. (iii) Mirror coupled reflected Brownian motions can simultaneously hit opposite sides of a wedge at different distances from the origin.

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