... fruit on one hand of many years of intense collaboration with Luigi Gal-gani, Antonio Giorgilli and Giovanni Gallavotti, from whom I learned, in theessence, all I know; on the other hand, they ... of applications — certainly non exhausting — will be the following:2Littlewood in ’59 produced a stability result for long times, t ∼ exp(log ε)2,inconnection with the triangular Lagrangian ... however,Gruppo Nazionale di Fisica Matematica and Istituto Nazionale di Fisica dellaMateria G. Benettin, J. Henrard, and S. Kuksin: LNM 1861, A. Giorgilli (Ed.), pp. 1–76, 2005.c Springer-Verlag...