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Markovity

In Probability,

The future depends only on today, not the past.

P(A1∩A2∩A3∩⋯ )=P(A1)P(A2∣A1)P(A3∣A2)⋯P(A_1 \cap A_2 \cap A_3 \cap \cdots) = P(A_1) P(A_2 | A_1) P(A_3 | A_2) \cdots

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