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Erschienen in: New Generation Computing 2/2022

03.08.2022

Codensity Games for Bisimilarity

verfasst von: Yuichi Komorida, Shin-ya Katsumata, Nick Hu, Bartek Klin, Samuel Humeau, Clovis Eberhart, Ichiro Hasuo

Erschienen in: New Generation Computing | Ausgabe 2/2022

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Abstract

Bisimilarity as an equivalence notion of systems has been central to process theory. Due to the recent rise of interest in quantitative systems (probabilistic, weighted, hybrid, etc.), bisimilarity has been extended in various ways, such as bisimulation metric between probabilistic systems. An important feature of bisimilarity is its game-theoretic characterization, where Spoiler and Duplicator play against each other; extension of bisimilarity games to quantitative settings has been actively pursued too. In this paper, we present a general framework that uniformly describes game characterizations of bisimilarity-like notions. Our framework is formalized categorically using fibrations and coalgebras. In particular, our characterization of bisimilarity in terms of fibrational predicate transformers allows us to derive what we call codensity bisimilarity games: a general categorical game characterization of bisimilarity. Our framework covers known bisimilarity-like notions (such as bisimulation metric and bisimulation seminorm) as well as new ones (including what we call bisimulation topology).

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Metadaten
Titel
Codensity Games for Bisimilarity
verfasst von
Yuichi Komorida
Shin-ya Katsumata
Nick Hu
Bartek Klin
Samuel Humeau
Clovis Eberhart
Ichiro Hasuo
Publikationsdatum
03.08.2022
Verlag
Ohmsha
Erschienen in
New Generation Computing / Ausgabe 2/2022
Print ISSN: 0288-3635
Elektronische ISSN: 1882-7055
DOI
https://doi.org/10.1007/s00354-022-00186-y

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