In the recent literature on time representation, an effort has been made to characterize the notion of time granularity and the relationships between granularities, in order to ha...
Recently there has been increased interest in logic programming-based default reasoning approaches which are not using negation-as-failure in their object language. Instead, defau...
Grigoris Antoniou, Michael J. Maher, David Billing...
This paper describes the concept of higher order quotients and an implementation in Isabelle. Higher order quotients are a generalization of quotients. They use partial equivalence...
Gregory McColm conjectured that positive elementary inductions are bounded in a class K of nite structures if every (FO + LFP) formula is equivalent to a rst-order formula in K. H...
An important reasoning task, in addition to the standard DL reasoning services, is conjunctive query answering. In this paper, we present a decision procedure for conjunctive query...