A numerical scale for non-locally connected planar continua




Timo Jolivet, Benoît Loridant, Jun Luo

PublisherELSEVIER SCIENCE BV

2016

Topology and its Applications

TOPOLOGY AND ITS APPLICATIONS

TOPOL APPL

202

21

39

19

0166-8641

1879-3207

DOIhttps://doi.org/10.1016/j.topol.2015.12.060



We introduce a numerical scale to quantify to which extent a planar continuum is not locally connected. For a locally connected continuum, the numerical scale is zero; for a continuum like the topologist's sine curve, the scale is one; for an indecomposable continuum, it is infinite. We use a purely topological framework of fibers and further characterize the local connectedness of a planar continuum in terms of triviality of its fibers. (C) 2016 Elsevier B.V. All rights reserved.




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