eprintid: 344 rev_number: 9 eprint_status: archive userid: 32 dir: disk0/00/00/03/44 datestamp: 2011-06-09 09:45:20 lastmod: 2011-07-11 14:36:26 status_changed: 2011-06-09 09:45:20 type: article metadata_visibility: show item_issues_count: 0 creators_name: Corradini, Flavio creators_name: De Nicola, Rocco creators_name: Labella, Anna creators_id: creators_id: r.denicola@imtlucca.it creators_id: title: A finite axiomatization of nondeterministic regular expressions ispublished: pub subjects: QA75 divisions: CSA full_text_status: none keywords: Semantics; regular expressions; axiomatizations; bisimulation. note: Mathematics Subject Classification: 68Q55; 68Q68; 08B05 abstract: An alternative (tree-based) semantics for a class of regular expressions is proposed that assigns a central rôle to the + operator and thus to nondeterminism and nondeterministic choice. For the new semantics a consistent and complete axiomatization is obtained from the original axiomatization of regular expressions by Salomaa and by Kozen by dropping the idempotence law for + and the distribution law of • over +. date: 1999 date_type: published publication: RAIRO - Theoretical Informatics and Applications volume: 33 number: 4/5 publisher: Cambridge University Press pagerange: 447-466 id_number: 10.1051/ita:1999127 refereed: TRUE official_url: http://dx.doi.org/10.1051/ita:1999127 citation: Corradini, Flavio and De Nicola, Rocco and Labella, Anna A finite axiomatization of nondeterministic regular expressions. RAIRO - Theoretical Informatics and Applications, 33 (4/5). pp. 447-466. (1999)