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Theory and applications of probability and stochastic processes: e.g. central limit theorems, large deviations, stochastic differential equations, models from statistical mechanics, queuing theory.

6 votes
1 answer
302 views

Random walk with decreasing steps

I have a random walk $$R(t)= \sum_{n<t} X_n,$$ with $X_n \sim U(-\tfrac{1}{n^\alpha}, \tfrac{1}{n^\alpha}),$ where $X_n$ are independant and $\alpha >0$. I think that someone must have studied this be …
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3 votes
1 answer
199 views

Simple random walk with an extra condition

Consider a simple random walk $$\mathcal{X}_t= \sum_{n<t} X_n,$$ where $P(X_n=1)= P(X_n=-1)= 1/2.$ If I put an extra condition that excludes cases with more than 5 consecutive +1, or -1 in the sum: Fo …
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  • 95