New PDF release: Concurrency, Graphs and Models: Essays Dedicated to Ugo

By Pierpaolo Degano, Rocco de Nicola, José Meseguer

ISBN-10: 3540686762

ISBN-13: 9783540686767

This Festschrift quantity, pubished in honor of Ugo Montanari at the celebration of his 65th birthday, includes forty three papers, written by way of acquaintances and associates, all top scientists of their personal correct, who congregated at a celebratory symposium hung on June 12, 2008, in Pisa.

The quantity comprises seven sections, six of that are devoted to the most learn parts to which Ugo Montanari has contributed: Graph Transformation; Constraint and common sense Programming; software program Engineering; Concurrency; versions of Computation; and software program Verification. each one of those six sections begins with an introductory paper giving an account of Ugo Montanari’s contribution to the realm and describing the papers within the part. the ultimate part comprises a couple of papers giving a laudation of Ugo Montanari’s a variety of achievements.

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Additional info for Concurrency, Graphs and Models: Essays Dedicated to Ugo Montanari on the Occasion of His 65th Birthday

Sample text

Definition 7 (causal relation). The causal relation of a grammar G is the binary relation < over Elem(G) defined as the least transitive relation satisfying: for any node or edge x in the type graph T , and for productions q, q ∈ P 1. if x ∈ • q then x < q; 2. if x ∈ q • then q < x; 3. if q • ∩ q = ∅ then q < q . As usual ≤ is the reflexive closure of <. Moreover, for x ∈ Elem(G) we denote by x the set of causes of x in P , namely {q ∈ P : q ≤ x}. , q ∩ • q = ∅, does not imply q < q . Instead, such productions are in asymmetric conflict (see [8,28,23]): The application of q prevents q from being applied, so that when both q and q occur in a derivation, then q must precede q .

Baldan, A. Corradini, and B. K¨ onig and acyclic structure all the possible computations of the original net N . , by the finite set of events which caused it, and events are related by the causality and symmetric conflict relations induced by the intersections of the pre- and post-sets: differently from the case of gtss, in a (safe) Petri net all conflicts are symmetric because transitions do not have a context. Functor U(N ) : S-N → O-N is the right adjoint to the inclusion functor O-N → S-N. The subsequent step abstracts an occurrence net O to a pes E(O), which is obtained from the unfolding simply by forgetting the places, and remembering only the events and the causality and conflict relations among them.

C Springer-Verlag Berlin Heidelberg 2008 38 R. Bruni et al. g. patterns that should be fulfilled also in the presence of reconfigurations and that can even trigger and drive efficient reconfigurations. There are many typical questions that arise during the design and analysis of software architectures. How do we represent architectures? How do we formalise architectural styles? How do we construct style conformant architectures? How do we model software architecture reconfigurations? How do we ensure style consistency?

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Concurrency, Graphs and Models: Essays Dedicated to Ugo Montanari on the Occasion of His 65th Birthday by Pierpaolo Degano, Rocco de Nicola, José Meseguer


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