Previous |  Up |  Next

Article

Keywords:
localic group; Closed Subgroup Theorem for localic groups; the uniformities of a localic group; two-sidedly complete topological groups; $LT$-groups
Summary:
The main purpose of this paper is to show that any localic group is complete in its two-sided uniformity, settling a problem open since work began in this area a decade ago. In addition, a number of other results are established, providing in particular a new functor from topological to localic groups and an alternative characterization of $LT$-groups.
References:
[1] Banaschewski B.: Completion in Pointfree Topology. Lecture Notes in Mathematics and Applied Mathematics No. 2/96, University of Cape Town, 1996. Zbl 1034.06008
[2] Banaschewski B., Hong S.S., Pultr A.: On the completion of nearness frames. Quaest. Math. 21 (1998), 19-37. MR 1658467 | Zbl 0931.54025
[3] Bourbaki N.: General Topology. Herrman, Paris and Addison-Wesley, Reading, Massachusetts, 1966. Zbl 1107.54001
[4] Isbell J.R.: Uniform spaces. A.M.S. Mathematical Survey 12, Providence, Rhode Island, 1964. MR 0170323 | Zbl 0124.15601
[5] Isbell J.R.: Atomless parts of spaces. Math. Scand. 31 (1972), 5-32. MR 0358725 | Zbl 0246.54028
[6] Isbell J.R.: Private communication. April 1994.
[7] Isbell J.R., Kříž I., Pultr A., Rosický J.: Remarks on localic groups. Springer LNM 1348, Categorial Algebra and its Applications, Proceedings, Louvain-la-Neuve, 1987, Springer-Verlag, 1988, pp.154-172. MR 0975968
[8] Johnstone P.T.: Stone Spaces. Cambridge University Press, Cambridge, 1982. MR 0698074 | Zbl 0586.54001
[9] Kříž I.: A direct description of uniform completion in locales and a characterization of LT-groups. Cahier Top. et Géom. Diff. Categ. 27 (1986), 19-34. MR 0845407
[10] Vickers S.: Topology via Logic. Cambridge Tracts in Theor. Comp. Sci. No. 5, Cambridge University Press, Cambridge, 1985. MR 1002193 | Zbl 0922.54002
Partner of
EuDML logo