Bertoin, Jean Regularity of the half-line for Lévy processes. (English) Zbl 0883.60069 Bull. Sci. Math. 121, No. 5, 345-354 (1997). From the author’s abstract: Consider a real-valued Lévy process \(X\) started at zero. One says \(0\) is regular for \((0,\infty)\) if \(X\) enters \((0,\infty)\) immediately. If \(X\) has unbounded variation, \(0\) is regular. If \(X\) has bounded variation with drift \(\delta>0\), then also \(0\) is regular. The author characterizes in terms of the Lévy measure the regularity of zero for processes of bounded variation with zero drift. Reviewer: M.Rao (Gainesville) Cited in 1 ReviewCited in 16 Documents MSC: 60J99 Markov processes 60G17 Sample path properties Keywords:Lévy process; Lévy measure; regularity; variation PDF BibTeX XML Cite \textit{J. Bertoin}, Bull. Sci. Math. 121, No. 5, 345--354 (1997; Zbl 0883.60069)