A numerical scale for non-locally connected planar continua
: Timo Jolivet, Benoît Loridant, Jun Luo
Publisher: ELSEVIER SCIENCE BV
: 2016
: Topology and its Applications
: TOPOLOGY AND ITS APPLICATIONS
: TOPOL APPL
: 202
: 21
: 39
: 19
: 0166-8641
: 1879-3207
DOI: https://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.