FInCo 2007 AGAPIA v0.1: A programming language for interactive systems and its typing system

Abstract A model (consisting of rv-systems), a core programming language (for developing rv-programs), several specification and analysis techniques appropriate for modeling, programming and reasoning about interactive computing systems have been recently introduced by Stefanescu using register machines and space-time duality, se

Mixed relations as enriched semiringal categories

Abstract: A study of the classes of nite relations as enriched strict monoidal categories is presented in [CaS91]. The relations there are interpreted as connections in owchart schemes, hence an \angelic " theory of relations is used. Finite relations may be used to model the connections between the components of data ow networks [BeS98, BrS96], as well. The corresponding algebras are slightly di erentenriched strict monoidal categories modeling a \forward-demonic " theory of relations. In order to obtain a full model for parallel programs one needs to mix control and reactive parts, hence a richer theory of nite relations is needed. In this paper we (1) de ne a model of such mixed nite relations, (2) introduce enriched (weak) semiringal categories as an abstract algebraic model for these relations, and (3) show that the initial model of the axiomatization (it always exists) is isomorphic to the de ned one of mixed relations. Hence the axioms gives a sound and complete axiomatization for the these relations. Key Words: parallel programs � mixed relations � network algebra � (enriched) semiringa