Unimodality of hitting times for stable processes

We show that the hitting times for points of real $\alpha-$stable Lévy processes ($1<\alpha\le 2$) are unimodal random variables. The argument relies on strong unimodality and several recent multiplicative identities in law. In the symmetric case we use a factorization of Yano et al., whereas in the completely asymmetric case we apply an identity of the second author. The method extends to the general case thanks to a fractional moment evaluation due to Kuznetsov et al.

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Source https://hal.science/hal-00864286
Author Letemplier, Julien, Simon, Thomas
Maintainer CCSD
Last Updated May 9, 2026, 02:52 (UTC)
Created May 9, 2026, 02:52 (UTC)
Identifier hal-00864286
Language en
Rights https://about.hal.science/hal-authorisation-v1/
contributor Laboratoire Paul Painlevé - UMR 8524 (LPP) ; Université de Lille-Centre National de la Recherche Scientifique (CNRS)
creator Letemplier, Julien
date 2013-11-07T00:00:00
harvest_object_id 61741e72-e266-4e33-9cc6-ca0447485228
harvest_source_id 3374d638-d20b-4672-ba96-a23232d55657
harvest_source_title test moissonnage SELUNE
metadata_modified 2024-05-02T00:00:00
relation info:eu-repo/semantics/altIdentifier/arxiv/1309.5321
set_spec type:UNDEFINED