Let Tom be the time at which the simple random walk reaches 0 for the mth occasion. Show that P(S,, 20 for ne {l,. ..,
Let Tom be the time at which the simple random walk reaches 0 for the mth occasion. Show that P(S,, 20 for ne {l,. .., k} | Tom = k) = Im 2 Hence, explain why P(S,, = -1 for some n) = 1
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