Codice QDD218 Titolo Bifurcation and segregation in quadratic two-populations Mean Field Games systems Data 2015-11-30 Autore/i Cirant, M.; Verzini, G. Link Download full text Abstract We consider a two-populations ergodic Mean Field Games system, which describes Nash equilibria in differential games with identical players. In these models, each population consists of a very large number of indistinguishable rational agents, aiming at minimizing some long-time average criterion. Via the Hopf-Cole transformation, such system reduces to a semilinear elliptic one, for normalized densities. Firstly, we discuss existence of nontrivial solutions; secondly, for selected families of nontrivial solutions, we address the appearing of segregation in the vanishing viscosity limit.