Limits of manifolds in the Gromov-Hausdorff metric space
Abstract
We apply the Gromov-Hausdorff metric $d_G$ for characterization of certain generalized manifolds. Previously, we have proved 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 {\sl manifold-like} generalized $n$-manifolds $X^{n},$ introduced in 1966 by Mardešić 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 $f_{\delta}\colon X^{n}\to M^{n}_{\delta}$ such that for every $u\in M^{n}_{\delta}$, $f^{-1}_{\delta}(u)$ 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.
- Publication:
-
arXiv e-prints
- Pub Date:
- January 2023
- DOI:
- arXiv:
- arXiv:2301.02029
- Bibcode:
- 2023arXiv230102029H
- Keywords:
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- Mathematics - Geometric Topology;
- Mathematics - Algebraic Topology;
- Mathematics - Differential Geometry;
- Primary 53C23;
- 55R20;
- 57P10;
- 57R65 57R67;
- Secondary 55M05;
- 55N99;
- 57P05;
- 57P99
- E-Print:
- Mediterr. J. Math. 20:1 (2023), art. 47, 11 pp