The \observational content" of geometric logic is discussed and it is proposed that geometric logic is an appropriate basis for a Z-like speci cation language in which schema...
We provide a description of generalized default logic as a unified formalism for nonmonotonic reasoning. Special attention will be paid to the role of the monotonic logic underlyi...
We explain the raison d’ˆetre and basic ideas of input/output logic, sketching the central elements with pointers to other publications for detailed developments. The motivation...
Abstract. The logical and operational aspects of rewriting logic as a logical framework are tested and illustrated in detail by representing pure type systems as object logics. Mor...
We study (collapsible) higher-order pushdown systems -- theoretically robust and well-studied models of higher-order programs -- along with their natural subclass called (collapsi...