Topological square of logic S4.1

Anton Kashchenko; Andrey Kudinov

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arXiv · 2607.13240

Topological square of logic S4.1

Anton Kashchenko·Andrey Kudinov

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Abstract

In this paper, we find the axiomatization for the topological square of S4.1. This is the first known topological square of a modal logic that differs from both the fusion and the Kripke product. We also prove the finite model property and decidability for this logic.

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Anton Kashchenko, Andrey Kudinov. 2026-07-14. Topological square of logic S4.1. https://arxiv.org/abs/2607.13240

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