Titlebook: Semantics for Concurrency; Proceedings of the I Marta Zofia Kwiatkowska,Michael William Shields,Ri Conference proceedings 1990 Springer-Ver

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1431-1682 - ment due to different, and often incompatible, attitudes towards abstracting non-sequential behaviour. When confronted with process algebras, which give rise to very elegant, highly abstract and com- positional models, traditionally based on the interleaving abstraction, some argue that the wealth

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Conference proceedings 1990 to different, and often incompatible, attitudes towards abstracting non-sequential behaviour. When confronted with process algebras, which give rise to very elegant, highly abstract and com- positional models, traditionally based on the interleaving abstraction, some argue that the wealth of contri

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Defining Fair Merge as a Colimit: Towards a Fixed-Point Theory for Indeterminate Dataflow,able sense. Given this it is rather surprising that one can give a limiting description of fair merge. The key idea is to define fair merge in terms of the limit of a sequence of “tests”. The approach is suggested by an algebraic theory of distributed computing based on the notion of a bimonoid or bialgebra.

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A Compositional Axiomatisation of Safety and Liveness Properties for Statecharts,nal techniques for proving safety properties to liveness, without immediately adopting temporal logic, since that formalism, elegant as it is, introduces some difficulties with a compositional treatment of sequentiality and looping.

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Traps, Free Choice and Home States, is impossible to reach the initial marking again. The net also has an unmarked trap (.., .., .., .., ..), that is, a set of places with the property that every output transition of the set is also an input transition of the set.