Lucas Bordeaux, Mikolas Janota, Joao Marques-Silva, and Pierre Marquis
We analyze, along the lines of the knowledge compilation map, both the tractability and the succinctness of the propositional language URC-C of unit-refutation complete propositional formulae, as well as its disjunctive closure URC-C[OR; EXISTS], and a superset of URC-C
where variables can be existentially quantified and unit-refutation completeness concerns only consequences built up from free variables.
In Principles of Knowledge Representation and Reasoning (KR 2012)
Publisher Association for the Advancement of Artificial Intelligence