Studia Logica 108 (2):239-254 (2020)

The notion of contact algebra is one of the main tools in the region-based theory of space. It is an extension of Boolean algebra with an additional relation C, called contact. Standard models of contact algebras are topological and are the contact algebras of regular closed sets in a given topological space. In such a contact algebra we add the predicate of internal connectedness with the following meaning—a regular closed set is internally connected if and only if its interior is a connected topological space in the subspace topology. We add also a ternary relation \ meaning that the intersection of the first two arguments is included in the third. In this paper the extension of a Boolean algebra with \, contact and internal connectedness, satisfying certain axioms, is called an extended contact algebra. We prove a representation theorem for extended contact algebras and thus obtain an axiomatization of the theory, consisting of the universal formulas, true in all topological contact algebras with added relations of internal connectedness and \.
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DOI 10.1007/s11225-019-09845-6
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References found in this work BETA

Point, Line, and Surface, as Sets of Solids.Theodore de Laguna - 1922 - Journal of Philosophy 19 (17):449-461.
Distributive Lattices.Raymond Balbes & Philip Dwinger - 1977 - Journal of Symbolic Logic 42 (4):587-588.
A Mereotopology Based on Sequent Algebras.Dimiter Vakarelov - 2017 - Journal of Applied Non-Classical Logics 27 (3-4):342-364.

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Citations of this work BETA

A Mereotopology Based on Sequent Algebras.Dimiter Vakarelov - 2017 - Journal of Applied Non-Classical Logics 27 (3-4):342-364.
Contact Join-semilattices.Tatyana Ivanova - forthcoming - Studia Logica:1-23.

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