We study xpoints of operators on lattices. To this end we introduce the notion of an approximation of an operator. We order approximations by means of a precision ordering. We sho...
Marc Denecker, V. Wiktor Marek, Miroslaw Truszczyn...
Models of software systems are built in Z and VDM using partial functions between sets and certain operations on these partial functions : extension ( ), restriction ( ), removal ...
Rewriting logic is a flexible and expressive logical framework that unifies algebraic denotational semantics and structural operational semantics (SOS) in a novel way, avoiding th...
abstractions to focus on principle issues and impose structure - Model behaviour - Determine correctness - Recursive equational axiomatisations with precise semantics yet algorithm...
Communication between natural or artificial agents relies on the use of a common vocabulary. Since sharing terms does not necessarily imply that the terms have exactly the same m...