Topology and Its Applications
In this paper we investigate generalized ordered (GO) spaces that have a flexible diagonal in the sense of Arhangel'skii (2009) . Spaces with a flexible diagonal are generalizations of topological groups and include spaces that are continuously homogeneous, Choban spaces, and rotoid spaces. We prove some paracompactness and metrization theorems for such spaces and construct examples of generalized ordered spaces that clarify how the types of spaces with a flexible diagonal are interrelated. We show, for example, that any GO Choban space is hereditarily paracompact, that any continuously homogeneous, first-countable GO-space is metrizable, that the space of real numbers is the only non-degenerate connected LOTS that is a Chbban space, and that the Sorgenfrey line and the Michael line are Choban spaces. We extend some results of Arhangel'skii and pose a family of questions. (C) 2013 Elsevier B.V. All rights reserved.
Bennett, H., Burke, D., & Lutzer, D. (2013). Choban operators in generalized ordered spaces. Topology and its Applications, 160(4), 633-647.