We prove that several problems concerning congruences on algebras are complete for nondeterministic log-space. These problems are: determining the congruence on a given algebra gen...
Abstract. We revisit the classical notion of noninterference for statebased systems, as presented by Rushby in 1992. We strengthen his results in several ways, in particular clarif...
Abstract. This paper presents a framework of specification and verification for distributed real-time object-oriented systems. An earlier paper [17] introduced a process calculus...
Abstract. Argumentation is a reasoning model based on the construction and the evaluation of arguments. In his seminal paper, Dung has proe most abstract argumentation framework. I...
In software engineering, graphical formalisms, like state-transition tables and automata, are very often indispensable parts of the specifications. Such a formalism usually leads t...