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Laboratoire d'informatique fondamentale de Marseille UMR 6166 - CNRS, Université de la Méditerranée, Université de Provence |
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| HAL : hal-00178806, version 2 |
| arXiv : 0710.2419 |
| Fiche détaillée | Récupérer au format |
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| Versions disponibles : | v1 (12-10-2007) | v2 (13-03-2008) |
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| The Variable Hierarchy for the Games mu-Calculus |
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| Walid Belkhir 1Luigi Santocanale 1 |
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| (12/10/2007) |
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| Parity games are combinatorial representations of closed Boolean mu-terms. By adding to them draw positions, they have been organized by Arnold and one of the authors into a mu-calculus. As done by Berwanger et al. for the propositional modal mu-calculus, it is possible to classify parity games into levels of a hierarchy according to the number of fixed-point variables. We ask whether this hierarchy collapses w.r.t. the standard interpretation of the games mu-calculus into the class of all complete lattices. We answer this question negatively by providing, for each n >= 1, a parity game Gn with these properties: it unravels to a mu-term built up with n fixed-point variables, it is semantically equivalent to no game with strictly less than n-2 fixed-point variables. |
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| 1 : | Laboratoire d'informatique Fondamentale de Marseille (LIF) |
| CNRS : UMR6166 – Université de la Méditerranée - Aix-Marseille II – Université de Provence - Aix-Marseille I | |
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| Domaine | : | Informatique/Logique en informatique Mathématiques/Logique Informatique/Informatique et théorie des jeux Informatique/Calcul parallèle, distribué et partagé |
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| variable hierarchy – parity games – mu-lattices |
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| hal-00178806, version 2 | |
| http://hal.archives-ouvertes.fr/hal-00178806 | |
| oai:hal.archives-ouvertes.fr:hal-00178806 | |
| Contributeur : Luigi Santocanale | |
| Soumis le : Jeudi 13 Mars 2008, 13:49:26 | |
| Dernière modification le : Mercredi 4 Mars 2009, 18:09:16 | |