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Orbitally discrete coarse spaces

Authors :
Igor Protasov
Source :
RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia, instname, Applied General Topology, Vol 22, Iss 2, Pp 303-309 (2021)
Publication Year :
2021
Publisher :
Universitat Politècnica de València, 2021.

Abstract

Given a coarse space (X, E), we endow X with the discrete topology and denote X ♯ = {p ∈ βG : each member P ∈ p is unbounded }. For p, q ∈ X ♯ , p||q means that there exists an entourage E ∈ E such that E[P] ∈ q for each P ∈ p. We say that (X, E) is orbitally discrete if, for every p ∈ X ♯ , the orbit p = {q ∈ X ♯ : p||q} is discrete in βG. We prove that every orbitally discrete space is almost finitary and scattered.

Details

Language :
English
Database :
OpenAIRE
Journal :
RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia, instname, Applied General Topology, Vol 22, Iss 2, Pp 303-309 (2021)
Accession number :
edsair.doi.dedup.....61b05a52e7c6ca29b08830875b06b716