{ "id": "1710.06855", "version": "v1", "published": "2017-10-18T17:52:43.000Z", "updated": "2017-10-18T17:52:43.000Z", "title": "On Properties of Nests: Some Answers and Questions", "authors": [ "Kyriakos Papadopoulos" ], "comment": "This paper has been published in the journal: Q & A in General Topology (Vol. 33, No 2, 2015.). arXiv admin note: substantial text overlap with arXiv:1302.2519", "journal": "Questions and Answers in General Topology, Volume 33, Number 2, 2015", "categories": [ "math.GN" ], "abstract": "By considering nests on a given space, we explore order-theoretical and topological properties that are closely related to the structure of a nest. In particular, we see how subbases given by two dual nests can be an indicator of how close or far are the properties of the space from the structure of a linearly ordered space. Having in mind that the term interlocking nest is a key tool to a general solution of the orderability problem, we give a characterization of interlocking nest via closed sets in the Alexandroff topology and via lower sets, respectively. We also characterize bounded subsets of a given set in terms of nests and, finally, we explore the possibility of characterizing topological groups via properties of nests. All sections are followed by a number of open questions, which may give new directions to the orderability problem.", "revisions": [ { "version": "v1", "updated": "2017-10-18T17:52:43.000Z" } ], "analyses": { "keywords": [ "orderability problem", "open questions", "dual nests", "alexandroff topology", "lower sets" ], "tags": [ "journal article" ], "note": { "typesetting": "TeX", "pages": 0, "language": "en", "license": "arXiv", "status": "editable" } } }