On internet I have read multiple times that if you have a 2D random walk and the walk continous for some large amount of step, the probability is almost 1 that our walk will cross the starting point. What is the argument for that? I tried to look up some proof but they were all to complicated. How can we argue for that mathematically but simple?
2026-04-07 00:18:09.1775521089
2D random walk crossing problem
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