— Ubiquitous computing provides services to users, according to their current situation. Interactions with such programs are as implicit as possible. We find among the applicati...
Abstract. We introduce a logical framework suitable to formalize structures of epistemic agents. Such a framework is based on the notion of weighted directed acyclic graphs (WDAGs)...
Building upon the 2-valued Layered Models semantics for normal programs, we introduce a refinement — the Layer Supported Models semantics — which, besides keeping all of LMs...
A novel approach is proposed for ezpresaing and computing eficienily a large cla88 of problem8, including jinding the shortest path in a graph, that were previously considered imp...
Abstract. Ghost variables are assignable variables that appear in program annotations but do not correspond to physical entities. They are used to facilitate specification and ver...