Invariant and Stably Invariant Sets for Differential Inclusions

We discuss conditions, in terms of Lyapunov functions, under which a given set in the extended phase space of a nonautonomous differential inclusion becomes positively invariant, invariant, stably invariant, or asymptotically stably invariant. We also derive conditions under which the integral funnel of a differential inclusion is recurrent in time. A series of examples are considered.