Waxa uu ka qalin jabiyay École normale supérieure sanadkii 1977 (sidoo kale Jean-Christophe Yoccoz, oo kale Fields Medalist). Isagoo diiday inuu qaato isku darka xisaabta, wuxuu doortay inuu sameeyo cilmi baaris ku saabsan xisaabta la adeegsaday wuxuuna ka helay shahaadada doctorate-ka Jaamacadda Pierre iyo Marie Curie sanadkii 1979. Lions wuxuu helay Fields Medal, shaqadiisa ku saabsan aragtida sinnaanta kala-duwanaanta qayb ahaan ee aan tooska ahayn, sanadkii 1994-kii isagoo ka shaqeynaya Jaamacadda Paris-Dauphine. Wuxuu ahaa kii ugu horreeyay ee bixiya xalka buuxa ee loo yaqaan 'Boltzmann equation' oo leh abaalmarino caddayn ah. Abaalmarino kale waxaa ka mid ah abaalmarinta IBM Lieri 1987 iyo Abaalmarinta Philip Morris ee 1991.
Macallin ka dhiga isle'egyada kala duwan ee qayb ahaan iyo codsiyadooda