Abstract
In his celebrated paper, Polya has considered the random walk in the three-dimensional (cubic) lattice and showed that the probability of return to the origin is less than 1. Subsequent authors have shown that the probability is %34.053.... Here we consider the same random walk, with the restriction that the drunkard is only allowed to stay inx⩾y⩾z. It is shown that his probability of returning to the originand staying in the allowed region is %6.4844....
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Wimp, J., Zeilberger, D. How likely is Polya's drunkard to stay in x⩾ y⩾z?. J Stat Phys 57, 1129–1135 (1989). https://doi.org/10.1007/BF01020052
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DOI: https://doi.org/10.1007/BF01020052