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  • Limits of manifolds in the Gromov-Hausdorff metric space
    Hegenbarth, Friedrich, 1940- ; Repovš, Dušan, 1954-
    We apply the Gromov-Hausdorff metric ▫$d_G$▫ for characterization of certain generalized manifolds. Previously, we have proven that with respect to the metric ▫$d_G$▫, generalized ▫$n$▫-manifolds are ... limits of spaces which are obtained by gluing two topological ▫$n$▫-manifolds by a controlled homotopy equivalence (the so-called 2-patch spaces). In the present paper, we consider the so-called manifold-like generalized ▫$n$▫-manifolds ▫$X^{n}$▫, introduced in 1966 by Mardeić and Segal, which are characterized by the existence of ▫$\delta$▫-mappings ▫$f_{\delta }$▫ of ▫$X^{n}$▫ onto closed manifolds ▫$M^{n}_{\delta }$▫, for arbitrary small ▫$\delta >0$▫, i.e., there exist onto maps ▫$f_{\delta }:X^{n}\rightarrow M^{n}_{\delta}$▫ such that for every ▫$M^{n}_{\delta }$▫, ▫$f^{-1}_{\delta }(u)$▫ has diameter less than ▫$\delta$▫. We prove that with respect to the metric ▫$d_G$▫, manifold-like generalized ▫$n$▫-manifolds ▫$X^{n}$▫ are limits of topological ▫$n$▫-manifolds ▫$M^{n}_{i}$▫. Moreover, if topological ▫$n$▫-manifolds ▫$M^{n}_{i}$▫ satisfy a certain local contractibility condition ▫${\mathcal {M}}(\varrho, n)$▫, we prove that generalized ▫$n$▫-manifold ▫$X^{n}$▫ is resolvable.
    Source: Mediterranean journal of mathematics. - ISSN 1660-5446 (Vol. 20, iss. 1, Feb. 2023, art: 47 (11 str.))
    Type of material - article, component part ; adult, serious
    Publish date - 2023
    Language - english
    COBISS.SI-ID - 135986179

source: Mediterranean journal of mathematics. - ISSN 1660-5446 (Vol. 20, iss. 1, Feb. 2023, art: 47 (11 str.))
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