Orbitally discrete coarse spaces
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https://riunet.upv.es/handle/10251/173897
Cita bibliográfica
Protasov, IV. (2021). Orbitally discrete coarse spaces. Applied General Topology. 22(2):303-309. https://doi.org/10.4995/agt.2021.13874
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[EN] 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.
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Applied General Topology issn: 1576-9402
