English

Sparre-Andersen identity and the last passage time

Probability 2015-06-18 v2

Abstract

It is shown that the celebrated result of Sparre Andersen for random walks and L\'evy processes has intriguing consequences when the last time of the process in (,0](-\infty,0], say σ\sigma, is added to the picture. In the case of no positive jumps this leads to six random times, all of which have the same distribution - the uniform distribution on [0,σ][0,\sigma]. Surprisingly, this result does not appear in the literature, even though it is based on some classical observations concerning exchangeable increments.

Cite

@article{arxiv.1501.04542,
  title  = {Sparre-Andersen identity and the last passage time},
  author = {Jevgenijs Ivanovs},
  journal= {arXiv preprint arXiv:1501.04542},
  year   = {2015}
}
R2 v1 2026-06-22T08:05:54.467Z