Krasinkiewicz spaces and parametric Krasinkiewicz maps
| dc.creator | Matsuhashi, Eiichi | |
| dc.creator | Valov, Vesko | |
| dc.date | 2008-02-29 | |
| dc.date | 2008-03-28 | |
| dc.date.accessioned | 2026-07-07T09:28:44Z | |
| dc.date.available | 2026-07-07T09:28:44Z | |
| dc.description | We say that a metrizable space $M$ is a Krasinkiewicz space if any map from a metrizable compactum $X$ into $M$ can be approximated by Krasinkiewicz maps (a map $g\colon X\to M$ is Krasinkiewicz provided every continuum in $X$ is either contained in a fiber of $g$ or contains a component of a fiber of $g$). In this paper we establish the following property of Krasinkiewicz spaces: Let $f\colon X\to Y$ be a perfect map between metrizable spaces and $M$ a Krasinkiewicz complete $ANR$-space. If $Y$ is a countable union of closed finite-dimensional subsets, then the function space $C(X,M)$ with the source limitation topology contains a dense $G_δ$-subset of maps $g$ such that all restrictions $g|f^{-1}(y)$, $y\in Y$, are Krasinkiewicz maps. The same conclusion remains true if $M$ is homeomorphic to a closed convex subset of a Banach space and $X$ is a $C$-space. | |
| dc.description | 14 pages | |
| dc.identifier | https://arxiv.org/abs/0802.4436 | |
| dc.identifier | http://arxiv.org/abs/0802.4436 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/157534 | |
| dc.subject | General Topology | |
| dc.subject | Geometric Topology | |
| dc.subject | 54F15; 54F45; 54E40 | |
| dc.title | Krasinkiewicz spaces and parametric Krasinkiewicz maps | |
| dc.type | text |