Properties of the solution set of nonlinear evolution inclusions (Q1363634)

The paper deals with nonlinear nonautonomous evolution inclusions of the form \[ \dot x(t)+ A(t,x(t)) \in F(t,x(t)), \] a.e. on \(T\), \(x(0) =x_0\) defined on a Gelfand triple of spaces \((X,H,X^*)\). In Section 3 the authors provide conditions for the solution set to be an \(R_\delta\)-set, or path-connected in \(C(T,H)\). An invariance result is given in Section 4, together with a result on the existence of periodic solutions. In the last section applications of these results are given for some parabolic partial differential equations with multivalued terms.