# About epistemic negation and world views in Epistemic Logic Programs

## TL;DR

This paper explores the semantics of Epistemic Logic Programs with epistemic negation, proposing new characterizations and methods to query their world views, advancing understanding in this logic extension.

## Contribution

It introduces a novel characterization of world views in Epistemic Logic Programs and methods to query them, differing from existing approaches.

## Key findings

- New characterization of world views
- Methods for querying world views
- Insights into the existence and number of world views

## 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 of World 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.