Machine Learning, Data Science, Mathematics, Markov Chains, Towards Data Science.
the graph of an irreducible Markov chain is strongly connected (graph theory). Illustration of the irreducibility property. The chain on the left is not irreducible: from 3 or 4 we can’t reach 1 or 2. The chain on the right (one edge has been added) is irreducible: each state can be reached from