2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/104870This text surveys properties and applications of the exponential functional $\int_0^t\exp(-ξ_s)ds$ of real-valued Lévy processes $ξ=(ξ_t,t\geq0)$.Published at http://dx.doi.org/10.1214/154957805100000122 in the Probability Surveys (http://www.i-journals.org/ps/) by the Institute of Mathematical Statistics (http://www.imstat.org)Probability60 G 51, 60 J 55 (Primary) 60 G 18, 44 A 60 (Secondary)text