1. Istituto di Matematiche Applicate ?Ulisse Dini?, Via Bonanno 25/b, 56100, Pisa 2. Dipartimento di Matematica, Via Buonarroti 2, 56100, Pisa 3. Scuola Normale Superiore, Piazza Cavalieri 7, 56126, Pisa
Abstract:
We study the asymptotic behaviour of the sequence of first order equations tu––ah(y)xu=0 by means of the related energies