Article ID Journal Published Year Pages File Type
5777940 Topology and its Applications 2017 7 Pages PDF
Abstract
It is shown that a connected space X is weakly orderable provided it has a finite-valued Vietoris continuous multiselection for its hyperspace F(X) of nonempty closed subsets. In fact, for connected spaces, every such multiselection is at most two-point valued, and X is compact whenever the multiselection is not singleton-valued at some element of F(X). Complementary to this result is a characterisation of weak orderability of connected spaces in terms of “proper” Vietoris continuous multiselections for hyperspaces of finite sets.
Related Topics
Physical Sciences and Engineering Mathematics Geometry and Topology
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