Previous |  Up |  Next

Article

Title: On half-completion and bicompletion of quasi-metric spaces (English)
Author: Alemany, Elena
Author: Romaguera, Salvador
Language: English
Journal: Commentationes Mathematicae Universitatis Carolinae
ISSN: 0010-2628 (print)
ISSN: 1213-7243 (online)
Volume: 37
Issue: 4
Year: 1996
Pages: 749-756
.
Category: math
.
Summary: We characterize the quasi-metric spaces which have a quasi-metric half-comp\-le\-tion and deduce that each paracompact co-stable quasi-metric space having a quasi-metric half-completion is metrizable. We also characterize the quasi-metric spaces whose bicompletion is quasi-metric and it is shown that the bicompletion of each quasi-metric compatible with a quasi-metrizable space $X$ is quasi-metric if and only if $X$ is finite. (English)
Keyword: quasi-metric
Keyword: quasi-uniform
Keyword: half-completion
Keyword: bicompletion
Keyword: uniformly \newline weakly regular
MSC: 54E15
MSC: 54E35
MSC: 54E50
idZBL: Zbl 0886.54027
idMR: MR1440705
.
Date available: 2009-01-08T18:27:40Z
Last updated: 2012-04-30
Stable URL: http://hdl.handle.net/10338.dmlcz/118882
.
Reference: [Cs] Császár A.: Extensions of quasi-uniformities.Acta Math. Hungar. 37 (1981), 121-145. MR 0616884
Reference: [De1] Deák J.: On the coincidence of some notions of quasi-uniform completeness defined by filters pairs.Studia Sci. Math. Hungar. 26 (1991), 411-413. MR 1197089
Reference: [De2] Deák J.: A bitopological view of quasi-uniform completeness I, II, III.Studia Sci. Math. Hungar., Part I, 30 (1995), 389-409; Part II, 30 (1995), 411-431; Part III, to appear. MR 1353614
Reference: [De3] Deák J.: Extending and completing quiet quasi-uniformities.Studia Sci. Math. Hungar. 29 (1994), 349-362. MR 1304888
Reference: [DR] Deák J., Romaguera S.: Co-stable quasi-uniform spaces.Ann. Univ. Sci. Budapest 38 (1995), 55-70. MR 1376415
Reference: [Do] Doitchinov D.: On completeness of quasi-uniform spaces.C.R. Acad. Bulg. Sci. 41 (1988), 5-8. Zbl 0649.54015, MR 0959596
Reference: [FH1] Fletcher P., Hunsaker W.: Uniformly regular quasi-uniformities.Top. Appl. 37 (1990), 285-291. Zbl 0707.54021, MR 1082939
Reference: [FH2] Fletcher P., Hunsaker W.: Completeness using pairs of filters.Top. Appl. 44 (1992), 149-155. Zbl 0770.54027, MR 1173251
Reference: [FL] Fletcher P., Lindgren W.F.: Quasi-Uniform Spaces.Dekker, 1982. Zbl 0583.54017, MR 0660063
Reference: [KMRV] Künzi H.P.A., Mrsevic M., Reilly I.L., Vamanamurthy M.K.: Convergence, precompactness and symmetry in quasi-uniform spaces.Math. Japonica 38 (1993), 239-253. MR 1213385
Reference: [KRS] Künzi H.P., Romaguera S., Salbany S.: Topological spaces that admit bicomplete quasi-pseudometrics.Ann. Univ. Sci. Budapest 37 (1994), 185-195. MR 1303429
Reference: [Kü1] Künzi H.P.A.: On strongly quasi-metrizable spaces.Archiv Math. (Basel) 41 (1983), 57-63. MR 0713668
Reference: [Kü2] Künzi H.P.A.: Complete quasi-pseudo-metric spaces.Acta Math. Hungar. 59 (1992), 121-146. MR 1160209
Reference: [RSV] Reilly I.L., Subrahmanyam P.V., Vamanamurthy M.K.: Cauchy sequences in quasi- pseudo-metric spaces.Monatsh. Math. 93 (1982), 127-140. Zbl 0472.54018, MR 0653103
Reference: [Ro1] Romaguera S.: Left $K$-completeness in quasi-metric spaces.Math. Nachr. 157 (1992), 15-23. Zbl 0784.54027, MR 1233044
Reference: [Ro2] Romaguera S.: Left $K$-complete quasi-uniform spaces.Seminar. Fach. Math. Fern Univ. Hagen 48 (1994), 101-114. MR 1467766
Reference: [Ro3] Romaguera S.: On hereditary precompactness and completeness in quasi-uniform spaces.Acta Math. Hungar., to appear. Zbl 0924.54035, MR 1415928
Reference: [RG] Romaguera S., Gutiérrez A.: A note on Cauchy sequences in quasi-pseudometric spaces.Glasnik Mat. 21 (1986), 191-200. MR 0866764
Reference: [RS] Romaguera S., Salbany S.: On bicomplete quasi-pseudometrizability.Top. Appl. 50 (1993), 283-289. Zbl 0827.54020, MR 1227555
Reference: [Sa] Salbany S.: Bitopological Spaces, Compactifications and Completions.Math. Monographs, Univ. Cape Town, no. 1, 1974. Zbl 0353.54021, MR 0425919
Reference: [SR] Salbany S., Romaguera S.: On countably compact quasi-pseudometrizable spaces.J. Austral. Math. Soc. (Series A) 49 (1990), 231-240. Zbl 0706.54027, MR 1061043
Reference: [St] Stoltenberg R.A.: On quasi-metric spaces.Duke Math. J. 36 (1969), 65-72. Zbl 0176.51902, MR 0235515
.

Files

Files Size Format View
CommentatMathUnivCarolRetro_37-1996-4_7.pdf 201.8Kb application/pdf View/Open
Back to standard record
Partner of
EuDML logo