{ "id": "1707.07130", "version": "v1", "published": "2017-07-22T09:43:00.000Z", "updated": "2017-07-22T09:43:00.000Z", "title": "On a locally compact semitopological $α$-bicyclic monoid", "authors": [ "Serhii Bardyla" ], "categories": [ "math.GN" ], "abstract": "In this paper for every ordinal $\\alpha<\\omega+1$ we describe all locally compact Hausdorff topologies which make $\\alpha$-bicyclic monoid $\\mathcal{B}_{\\alpha}$ a semitopological semigroup. In particular, we prove that there exist exactly $k$ distinct locally compact Hausdorff topologies which make $\\mathcal{B}_{k}$ a semitopological semigroup and the set of all distinct locally compact Hausdorff topologies which make $\\mathcal{B}_{\\omega}$ a semitopological semigroup is countable. Moreover, for every ordinal $\\alpha<\\omega+1$ the set of all locally compact Hausdorff topologies on $\\mathcal{B}_{\\alpha}$ which make $\\mathcal{B}_{\\alpha}$ a semitopological semigroup is linearly ordered by the inclusion. Also we prove that for each ordinal $\\alpha$ the $\\alpha+1$-bicyclic semigroup $\\mathcal{B}_{\\alpha+1}$ is isomorphic to the Bruck extension of the $\\alpha$-bicyclic semigroup $\\mathcal{B}_{\\alpha}$.", "revisions": [ { "version": "v1", "updated": "2017-07-22T09:43:00.000Z" } ], "analyses": { "keywords": [ "bicyclic monoid", "distinct locally compact hausdorff topologies", "locally compact semitopological", "semitopological semigroup", "bicyclic semigroup" ], "note": { "typesetting": "TeX", "pages": 0, "language": "en", "license": "arXiv", "status": "editable" } } }