Abstract
We give a negative solution to the problem, posed by A. Chagrov and M. Zakharyaschev, of whether every quasi-normal propositional modal logic can be axiomatized by an independent set of axioms, with the inference rules of Substitution and Modus Ponens.
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Acknowledgements
We are grateful to the late Alexander Chagrov for stimulating the work presented here and to Marcus Kracht, Michael Zakharyaschev, and Mikhail Rybakov for discussions of ideas related to this work. We are indebted to anonymous reviewers for helping to improve the paper. The work on this paper has been supported by Russian Science Foundation, project 21-18-00195.
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Presented by Yde Venema.
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Gorbunov, I., Shkatov, D. On Independent Axiomatizability of Quasi-Normal Modal Logics. Stud Logica 110, 1189–1217 (2022). https://doi.org/10.1007/s11225-022-09992-3
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DOI: https://doi.org/10.1007/s11225-022-09992-3