We introduce a general and compositional, yet simple, framework that allows to derive soundness and expressiveness results for modal logics characterizing behavioural equivalences or metrics (also known as Hennessy-Milner theorems). It is based on Galois connections between sets of (real-valued) predicates on the one hand and equivalence relations/metrics on the other hand and covers a part of the linear-time-branching-time spectrum, both for the qualitative case (behavioural equivalences) and the quantitative case (behavioural metrics). We derive behaviour functions from a given logic and give a condition, called compatibility, that characterizes under which conditions a logically induced equivalence/metric is induced by a fixpoint equation. In particular, this framework allows to derive a new fixpoint characterization of directed trace metrics.
@InProceedings{beohar_et_al:LIPIcs.CSL.2023.12, author = {Beohar, Harsh and Gurke, Sebastian and K\"{o}nig, Barbara and Messing, Karla}, title = {{Hennessy-Milner Theorems via Galois Connections}}, booktitle = {31st EACSL Annual Conference on Computer Science Logic (CSL 2023)}, pages = {12:1--12:18}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-264-8}, ISSN = {1868-8969}, year = {2023}, volume = {252}, editor = {Klin, Bartek and Pimentel, Elaine}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.CSL.2023.12}, URN = {urn:nbn:de:0030-drops-174735}, doi = {10.4230/LIPIcs.CSL.2023.12}, annote = {Keywords: behavioural equivalences and metrics, modal logics, Galois connections} }
Feedback for Dagstuhl Publishing