relation: http://eprints.imtlucca.it/353/ title: Basic Observables for Processes creator: Boreale, Michele creator: De Nicola, Rocco creator: Pugliese, Rosario subject: QA75 Electronic computers. Computer science description: We propose a general approach to define behavioural preorders over process terms by considering the pre-congruences induced by three basic observables. These observables provide information about the initial communication capabilities of processes and about their possibility of engaging in an infinite internal chattering. We show that some of the observables-based pre-congruences do correspond to behavioral preorders long studied in the literature. The coincidence proofs shed light on the differences between the must preorder of De Nicola and Hennessy and the fair/should preorder of Cleaveland and Natarajan and of Brinksma, Rensink and Vogler, and on the rĂ´le played in their definition by tests for internal chattering. publisher: Springer contributor: Degano, Pierpaolo contributor: Gorrieri, Roberto contributor: Marchetti-Spaccamela, Alberto date: 1997 type: Book Section type: PeerReviewed identifier: Boreale, Michele and De Nicola, Rocco and Pugliese, Rosario Basic Observables for Processes. In: Automata, Languages and Programming (ICALP 1997). Lecture Notes in Computer Science, 1256 . Springer, pp. 482-492. ISBN 3-540-63165-8 (1997) relation: http://dx.doi.org/10.1007/3-540-63165-8_204 relation: 10.1007/3-540-63165-8_204