Let $ X(t): t ≥ 0 % be a Brownian motion with variance parameter σ 2 . Let T α be the time of hitting α first. Let Y ∼ N (0, σ 2 /α 2 ). Show that, for α > 0, T α and 1/Y 2 are identically...




Let $ X(t): t ≥ 0 % be a Brownian motion with variance parameter σ2. Let Tα
be the time of hitting α first. Let Y ∼ N (0, σ22). Show that, for α > 0, Tα
and 1/Y2
are identically distributed.



May 13, 2022
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