Multiple nodal solutions to a Robin problem with sign-changing potential and locally defined reaction

Multiple nodal solutions to a Robin problem with sign-changing potential and locally defined reaction

Umberto Guarnotta, Salvatore A. Marano
Dipartimento di Matematica e Informatica, Universita degli Studi di Catania,
Viale A. Doria 6, 95125 Catania, Italy
E-mail: umberto.guarnotta@gmail.com, marano@dmi.unict.it
Nikolaos S. Papageorgiou
Department of Mathematics, National Technical University of Athens,
Zografou Campus, 15780 Athens, Greece
E-mail: npapg@math.ntua.gr