relation: http://eprints.imtlucca.it/385/ title: CCS without tau's creator: De Nicola, Rocco creator: Hennessy, Matthew subject: QA75 Electronic computers. Computer science description: The main point of this paper is that one can develop an adequate version of CCS which does not use the special combinator tau for internal actions. Instead, the choice operator +, whose semantics is somewhat unclear, is replaced by two new choice operators oplus and [], representing internal and external nondeterminism respectively. The operational semantics of the resulting language is simpler and the definition of testing preorders is significantly cleaner. The essential features of the original calculus are kept; this is shown by defining a translation from CCS to the new language which preserves testing preorders. publisher: Springer contributor: Ehrig, Hartmut contributor: A. Kowalski, Robert contributor: Levi, Giorgio contributor: Montanari, Ugo date: 1987 type: Book Section type: PeerReviewed identifier: De Nicola, Rocco and Hennessy, Matthew CCS without tau's. In: TAPSOFT '87, Vol.1. Lecture Notes in Computer Science, 249 . Springer, pp. 138-152. ISBN 3-540-17660-8 (1987) relation: http://dx.doi.org/10.1007/3-540-17660-8_53 relation: 10.1007/3-540-17660-8_53