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... Definition 2.2. Let {Sn } be a random walk on Rd and let x ∈ Rd . (i) x is said to be a possible point for {Sn } if ∀ > 0, ∃N ∈ N such that P (|SN − x| < ) > 0. (ii) x is said to be a recurrent point for {Sn } if ∀ > 0, P (|Sn − x| < i.o.) = 1. That is, x is a possible point for a random walk i ...
... Definition 2.2. Let {Sn } be a random walk on Rd and let x ∈ Rd . (i) x is said to be a possible point for {Sn } if ∀ > 0, ∃N ∈ N such that P (|SN − x| < ) > 0. (ii) x is said to be a recurrent point for {Sn } if ∀ > 0, P (|Sn − x| < i.o.) = 1. That is, x is a possible point for a random walk i ...