Poisson arrivals see time averages
= Poisson arrivals see time averages
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= PASTA
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The Poisson arrivals see time averages property says that an external <Poisson process> independent of a stationary system sees the system-state distribution at its arrival times. Thus the fraction of arrivals that accept a state-dependent admission rule $p(n)$ is $\sum_n\pi_np(n)$.