Abstract
It is proved that a (d-2) or lower dimensionalC 2-submanifold is a polar set for a nondegenerated-dimensional diffusion process. A similar result is established also for diffusions in a closed half space with reflecting boundary conditions.
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Ramasubramanian, S. Hitting of submanifolds by diffusions. Probab. Th. Rel. Fields 78, 149–163 (1988). https://doi.org/10.1007/BF00718043
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DOI: https://doi.org/10.1007/BF00718043