eprintid: 403
rev_number: 11
eprint_status: archive
userid: 31
dir: disk0/00/00/04/03
datestamp: 2011-06-15 11:51:52
lastmod: 2011-07-11 14:35:30
status_changed: 2011-06-15 11:51:52
type: article
metadata_visibility: show
item_issues_count: 0
creators_name: Banti, Federico
creators_name: Pugliese, Rosario
creators_name: Tiezzi, Francesco
creators_id: 
creators_id: 
creators_id: francesco.tiezzi@imtlucca.it
title: A criterion for separating process calculi
ispublished: pub
subjects: QA75
divisions: CSA
full_text_status: public
note: © F. Banti, R. Pugliese & F. Tiezzi
abstract: 	We introduce a new criterion, replacement freeness, to discern the relative expressiveness of process calculi. Intuitively, a calculus is strongly replacement free if replacing, within an enclosing context, a process that cannot perform any visible action by an arbitrary process never inhibits the capability of the resulting process to perform a visible action. We prove that there exists no compositional and interaction sensitive encoding of a not strongly replacement free calculus into any strongly replacement free one. We then define a weaker version of replacement freeness, by only considering replacement of closed processes, and prove that, if we additionally require the encoding to preserve name independence, it is not even possible to encode a non replacement free calculus into a weakly replacement free one. As a consequence of our encodability results, we get that many calculi equipped with priority are not replacement free and hence are not encodable into mainstream calculi like CCS and pi-calculus, that instead are strongly replacement free. We also prove that variants of pi-calculus with match among names, pattern matching or polyadic synchronization are only weakly replacement free, hence they are separated both from process calculi with priority and from mainstream calculi.
date: 2010
date_type: published
series: EPTCS
publication: Proc. of 17th International Workshop on Expressiveness in Concurrency (EXPRESS 2010), Electronic Proceedings in Theoretical Computer Science
volume: 41 
publisher: Open Publishing Association 
pagerange: 16-30
id_number: 10.4204/EPTCS.41.2
refereed: TRUE
issn: 20752180 
book_title: Electronic Proceedings in Theoretical Computer Science (EXPRESS'10)
editors_name: B. Froschle, Sibylle
editors_name: D. Valencia, Frank
official_url: http://arxiv.org/abs/1011.6430v1
citation:   Banti, Federico and Pugliese, Rosario and Tiezzi, Francesco  A criterion for separating process calculi.  Proc. of 17th International Workshop on Expressiveness in Concurrency (EXPRESS 2010), Electronic Proceedings in Theoretical Computer Science, 41 .  pp. 16-30.  ISSN 20752180       (2010)  
document_url: http://eprints.imtlucca.it/403/1/express_2010a.pdf