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A stochastic process is a collection of random variables usually indexed by a totally ordered set.

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Occupation time of non-stationary random walk

Assume $\varepsilon \in [0,1/2]$. Consider the discrete-time random walk $X_0 = 0$, $X_{t+1} - X_t \sim f(X_t) \delta_0 + (1-f(X_t))\operatorname{Rademacher}$, where $\delta_0$ is the Dirac delta on z …