4.4. Let {a; : i = 1, 2, ...} be a probability distribution, and consider the Markov chain whose transition probability matrix is

What condition on the probability distribution { a; : i = 1, 2, ... } is necessary and sufficient in order that a limiting distribution exist, and what is this limiting distribution? Assume

a, > 0 and a2 > 0, so that the chain is aperiodic.

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0 1 2 3 4 5 as 1 1 00000 2 0 10000 30 01000 400 0100