Chapter 3: It should say posterior not prios

[ooau]

In Chapter 3 in the last sentence of the first paragraph of the section Total Probability Theorem i think it should say posterior instead of prior.

The probability of being at any position 𝑖 at time 𝑡 can be written as 𝑃(𝑋𝑡𝑖) . We computed that as the sum of the prior at time 𝑡−1 𝑃(𝑋𝑡−1𝑗) multiplied by the probability of moving from cell 𝑥𝑗 to 𝑥𝑖 .