Read e-book online Concurrency, Compositionality, and Correctness: Essays in PDF

By Dennis Dams, Ulrich Hannemann, Martin Steffen

ISBN-10: 364211511X

ISBN-13: 9783642115110

This Festschrift quantity, released in honor of Willem-Paul de Roever, comprises 19 targeted papers written through the buddies and associates of the honoree, all eminent scientists of their personal correct. those are preceded by way of an in depth bibliography and rounded off, on the finish of the e-book, with a gallery of photographs.

The subject less than which the papers were amassed is Concurrency, Compositionality, and Correctness, reflecting the point of interest of Willem-Paul de Roever's examine occupation. subject matters addressed comprise version checking, computing device technological know-how and nation machines, ontology and mereology of domain names, video game thought, compiler correctness, reasonable scheduling and encryption algorithms.

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Sci. 12, 177–192 (1970) 14. : Complexity of some two-person perfect-information games. J. Comput. Syst. Sci. 16, 185–225 (1978) 15. : IP = PSPACE. J. Assoc. Comput. Mach. 39, 878–880 (1992) 16. : Word problems requiring exponential time. In: Proc. ACM STOC, vol. 5, pp. 1–9 (1973) 17. : Machine models and simulations. In: van Leeuwen, J. ) Handbook of theoretical computer science, vol. A, pp. 3–66. North Holland Publ. Cie, MIT Press (1990) 18. : The convenience of tiling. In: Sorbi, A. ) Complexity, Logic and Recursion Theory.

Observed unique link (hub) identiﬁers are indeed identiﬁers of links (hubs) of the net in which the observation takes place. −1. L, LI, H, HI, 2. −4. ∀ (ls,hs):N • card ls ≥ 1 ∧ card hs ≥ 2 value 1. obs LI: L → LI, obs HI: H → HI, 5. obs HIs: L → HI-set axiom ∀ l:L • card obs HIs(l)=2, 6. obs LIs: H → LI-set axiom ∀ h:H • card obs LIs(l)≥1 axiom 7. ) There are vehicles (private cars, taxis, buses, trucks). , “in the traﬃc” (see further on), have positions. ) Time is a discrete, dense well-ordered set of time points and time points are further undeﬁned.

We do so by labelling, β i , behaviours, βi , that is, ascribing names to behaviours. , βχ ). Now we can label an event by the set of labels of the processes “in” which the event occur. That is, with either two or more labels, or just one. When the external behaviour label βχ is in the set then it shall mean that the event either “originates” outside the behaviours of the other labels, or is “directed” at all those behaviours. We do not, however, wish to impose any direction! Here we wish to remind the reader that “our” behaviours take place “in the domain”, that is, they are not necessarily those of computing processes, unless, of course, the domain is, or (“strongly”) includes that of computing; and “in the domain” we can always speak “globally”, that is: we may postulate properties that may not be computable or even precisely observable, that is: two time stamps may be diﬀerent even though they are of two actions or events that actually did or do take place simultaneously.

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