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Listar por palabra clave "Coarse structure"

RiuNet: Repositorio Institucional de la Universidad Politécnica de Valencia

Listar por palabra clave "Coarse structure"

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    Balleans, hyperballeans and ideals 
    Dikranjan, Dikran; Protasov, Igor; Protasova, Ksenia; Zava, Nicolò (Universitat Politècnica de València, 2019-10-01)
    [EN] A ballean B (or a coarse structure) on a set X is a family of subsets of X called balls (or entourages of the diagonal in X × X) dened in such a way that B can be considered as the asymptotic counterpart of a uniform ...
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    Counting coarse subsets of a countable group 
    Protasov, Igor; Protasova, Ksenia (Universitat Politècnica de València, 2018-04-02)
    [EN] For every countable group G, there are 2ω distinct classes of coarselyequivalent subsets of G.
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    Extremal balleans 
    Protasov, Igor (Universitat Politècnica de València, 2019-04-01)
    [EN] A ballean (or coarse space) is a set endowed with a coarse structure. A ballean X is called normal if any two asymptotically disjoint subsets of X are asymptotically separated. We say that a ballean X is ultra-normal ...