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arXiv · 2606.31880

On Modal Logics of Connectedness in Metric Spaces

John Harding·Ilya Shapirovsky
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Abstract

For a positive number a, each metric space carries the relation D_a consisting of those pairs that are of distance less than a apart. A space X is said to be a-connected, if the graph (X,D_a) is connected (that is, there is a D_a-path between every pair of points in X). We give a complete axiomatization of a-connected metric spaces in the language with a family of distance modalities and the universal modality. Then we give a complete axiomatization of the logic of connected (in the classical topological sense) metric spaces in the language with the topological modality, universal modality, and a single distance modality. We also show that these logics have the finite model property.

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John Harding, Ilya Shapirovsky. 2026-06-30. On Modal Logics of Connectedness in Metric Spaces. https://doi.org/10.4204/eptcs.447.27

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