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The notions of a {\em 2-precontact space}\/ and a {\em 2-contact space}\/ are introduced. Using them, new representation theorems for precontact and contact algebras are proved. It is shown that there are bijective correspondences between…

General Topology · Mathematics 2015-11-24 Georgi Dimov , Dimiter Vakarelov

Gelfand-Naimark-Stone duality provides an algebraic counterpart of compact Hausdorff spaces in the form of uniformly complete bounded archimedean $\ell$-algebras. In [4] we extended this duality to completely regular spaces. In this article…

General Topology · Mathematics 2019-05-17 G. Bezhanishvili , P. J. Morandi , B. Olberding

Extensions of Stone-type dualities have a long history in algebraic logic and have also been instrumental in proving results in algebraic language theory. We show how to extend abstract categorical dualities via monoidal adjunctions,…

Formal Languages and Automata Theory · Computer Science 2025-10-15 Fabian Lenke , Henning Urbat , Stefan Milius

Generalizing Duality Theorem of V. V. Fedorchuk, we prove Stone-type duality theorems for the following four categories: all of them have as objects the locally compact Hausdorff spaces, and their morphisms are, respectively, the continuous…

General Topology · Mathematics 2007-10-01 Georgi Dobromirov Dimov

Profinite algebras are the residually finite compact algebras; their underlying topological spaces are Stone spaces. We extend the theory of profinite algebras to a more general setting of Stone topological algebras. We introduce Stone…

Logic · Mathematics 2024-09-25 Jorge Almeida , Ondřej Klíma

Classic work of Pierce and Dauns-Hofmann shows that biregular rings are dual to simple ring bundles over Stone spaces. We extend this duality to Steinberg rings, a purely algebraic generalisation of Steinberg algebras, and ringoid bundles…

Rings and Algebras · Mathematics 2023-03-24 Tristan Bice

We extend Yosida's 1941 version of Stone-Gelfand duality to metrically complete unital lattice-ordered groups that are no longer required to be real vector spaces. This calls for a generalised notion of compact Hausdorff space whose points…

Functional Analysis · Mathematics 2024-11-27 Marco Abbadini , Vincenzo Marra , Luca Spada

In general terms, Gelfand duality refers to a correspondence between a geometric, topological, or analytical category, and an algebraic category. For example, in smooth differential geometry, Gelfand duality refers to the topological…

Differential Geometry · Mathematics 2020-09-23 Andrew D. Lewis

A preordered topological space is a topological space with a preordering. We exhibit a Stone-like duality for preordered topological spaces, Inspired by a similar duality for bitopological spaces, due to Jung-Moshier and Jakl, and by a…

General Topology · Mathematics 2026-01-21 Jean Goubault-Larrecq

The theory of natural dualities provides a well-developed framework for studying Stone-like dualities induced by an algebra $\mathbf{L}$ which acts as a dualizing object when equipped with suitable topological and relational structure. The…

Logic · Mathematics 2025-05-19 Marco Abbadini , Adam Přenosil

This is the last in a series of three notes on an investigation into core regular double Stone algebras, CRDSA, which are meant to be read in order. This note ends our initial investigation of duality for CRDSA through bi-topological…

Rings and Algebras · Mathematics 2018-09-25 Daniel J. Clouse

We connect Priestley duality for distributive lattices and its generalization to distributive meet-semilattices to Hofmann-Mislove-Stralka duality for semilattices. Among other things, this involves consideration of various morphisms…

Logic · Mathematics 2024-11-25 Guram Bezhanishvili , Luca Carai , Patrick Morandi

We develop the theory of distributive inverse semigroups as the analogue of distributive lattices without top element and prove that they are in a duality with those etale groupoids having a spectral space of identities, where our spectral…

Category Theory · Mathematics 2013-02-14 Mark V Lawson , Daniel H Lenz

Recently in \cite{FM, FlMo}, the language of MV-algebras was extended by adding a unary operation, an internal operator, called also a state-operator. In \cite{DD1}, a stronger version of state MV-algebras, called state-morphism MV-algebras…

Functional Analysis · Mathematics 2010-06-11 Antonio Di Nola , Anatolij Dvurecenskij , Ada Lettieri

In [G. Dimov and E. Ivanova-Dimova, Two extensions of the Stone Duality to the category of zero-dimensional Hausdorff spaces, arXiv:1901.04537v4, 1--33], extending the Stone Duality Theorem, we proved two duality theorems for the category…

General Topology · Mathematics 2020-10-02 Georgi Dimov , Elza Ivanova-Dimova

Gelfand-Naimark-Stone duality establishes a dual equivalence between the category ${\sf KHaus}$ of compact Hausdorff spaces and the category ${\boldsymbol{\mathit{uba}\ell}}$ of uniformly complete bounded archimedean $\ell$-algebras. We…

General Topology · Mathematics 2020-02-18 Guram Bezhanishvili , Patrick J. Morandi , Bruce Olberding

Under a general categorical procedure for the extension of dual equivalences as presented in this paper's predecessor, a new algebraically defined category is established that is dually equivalent to the category $\bf LKHaus$ of locally…

Category Theory · Mathematics 2021-09-16 G. Dimov , E. Ivanova-Dimova , W. Tholen

We present an abstract unifying framework for interpreting Stone-type dualities; several known dualities are seen to be instances of just one topos-theoretic phenomenon, and new dualities are introduced. In fact, infinitely many new…

Category Theory · Mathematics 2011-04-06 Olivia Caramello

We extend Stone duality to a fully faithful embedding of condensed sets into fpqc sheaves over an arbitrary field, which preserves colimits and finite limits. We study how familiar notions from condensed mathematics/topology and algebraic…

Algebraic Geometry · Mathematics 2024-01-08 Rok Gregoric

We establish a natural duality between the category of involutive bisemilattices and the category of semilattice inverse systems of Stone spaces, using Stone duality from one side and the representation of involutive bisemilattices as…

Logic · Mathematics 2017-11-10 Stefano Bonzio , Andrea Loi , Luisa Peruzzi