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The Effros metric

Authors: Janusz J. Charatonik; Janusz J. Charatonik; Włodzimierz J. Charatonik; Włodzimierz J. Charatonik;

The Effros metric

Abstract

The authors define and investigate Effros metric \(\sigma_M\geq \rho\) defined on a bounded metric space \((X,\rho)\) by means of a semigroup \(M\) of surjections \(X\to X\) (a continuation and generalization of a paper by \textit{J. J. Charatonik} and \textit{T. Maćkowiak} [Trans. Am. Math. Soc. 298, 579-602 (1986; Zbl 0608.54012)]. The original Effros result on existence of ``small'' translations for homogeneous compact metric spaces [Ann. Math. (2) 81, 38-55 (1965; Zbl 0152.33203)] is then generalized for the above situation: \((X,\rho)\) has the Effros property with regard to \(M\) iff \(\sigma_M\) and \(\rho\) are equivalent. The results are applied to locally connected continua and local AR; for instance, local AR has the Effros property with regard to all surjections, no dendrite has the Effros property with regard to monotone maps.

Keywords

Locally connected, Open, Dendrite, continuum, Compact (locally compact) metric spaces, Transformation groups and semigroups (topological aspects), Continua and generalizations, homogeneity, Mapping, Metric spaces, metrizability, Continuum, Homogeneous, Geometry and Topology, Metric, Special maps on metric spaces, Effros metric, Effros property

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
2
Average
Average
Average
hybrid
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