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In Van Kampen's "Stochastic Processes in Physics" it says (page 79) that any given 2 non negative functions: p1(y,t), p11(y1,t1 | y2,t2) that satisfy:

1. The Chapman-Kolmogorov equation: p11(y3,t3 | t1,t1) = integrate(p11(y3,t3 |y2,t2) p11(y2,t2| y1,t1).

2. p1(y2,t2)= Integrate(p11(y2,t2 |y1,t1) p1(y1,t1)dy1

define uniquely a Markov process. But unfortunately it doesn't provide a proof.

My question is, how can you prove it? I have been trying to find a way to get to the next probablity function p12(y1,t1 | y2,t2 , y3,t3) in order to show the Markov property exists, and I just can't find a way to do it.

Thanks

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# Proving a process is Markovian

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