About Epistemic Negation and World Views in Epistemic Logic Programs
STEFANIA COSTANTINI · Theory and Practice of Logic Programming · 2019
Abstract In this paper we consider Epistemic Logic Programs, which extend Answer Set Programming (ASP) with “ epistemic operators” and “ epistemic negation”, and a recent approach to the semantics of such programs in terms ofWorld Views. We propose some observations on the existence and number of world views. We show how to exploit an extended ASP semantics in order to: (i) provide a characterization of world views, different from existing ones; (ii) query world views and query the whole set of world views.