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Title: Measures of compactness in approach spaces (English)
Author: Baekeland, R.
Author: Lowen, R.
Language: English
Journal: Commentationes Mathematicae Universitatis Carolinae
ISSN: 0010-2628 (print)
ISSN: 1213-7243 (online)
Volume: 36
Issue: 2
Year: 1995
Pages: 327-345
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Category: math
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Summary: We investigate whether in the setting of approach spaces there exist measures of relative compactness, (relative) sequential compactness and (relative) countable compactness in the same vein as Kuratowski's measure of compactness. The answer is yes. Not only can we prove that such measures exist, but we can give usable formulas for them and we can prove that they behave nicely with respect to each other in the same way as the classical notions. (English)
Keyword: approach space
Keyword: compactness
MSC: 54A05
MSC: 54E99
idZBL: Zbl 0838.54020
idMR: MR1357533
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Date available: 2009-01-08T18:18:13Z
Last updated: 2012-04-30
Stable URL: http://hdl.handle.net/10338.dmlcz/118760
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Reference: [1] Baekeland R., Lowen R.: Measures of Lindelöf and separability in approach spaces.to appear in Internat. J. Math & Math. Sci. Zbl 0813.54022, MR 1277744
Reference: [2] Beer G.: On a measure of non-compactness.Rend. Mat. Appl. 72 (1987), 193-205 (1988).
Reference: [3] Bourbaki N.: Elements de Mathématique : Livre III, Topologie générale'.Hermann, Paris, 1962. Zbl 0305.54003
Reference: [4] Dugundji J.: Topology.Allan and Bacon, Boston, 1966. Zbl 0397.54003, MR 0193606
Reference: [5] Gaal S.: Point Set Topology.Academic Press, New York, 1964. Zbl 0124.15401, MR 0171253
Reference: [6] Lowen E., Lowen R.: A quasi-topos containing CONV and MET as full subcategories.Internat. J. Math. & Math. Sci. 11:3 (1988), 417-438. MR 0947271
Reference: [7] Lowen E., Lowen R.: Topological quasitopos hulls of categories containing topological and metric objects.Cahiers de Topologie et Géométrie différentielle catégoriques 30:3 (1989), 213-228. Zbl 0706.18002, MR 1029625
Reference: [8] Lowen R.: Approach spaces: a common supercategory of TOP and MET.Math. Nachr. 141 (1989), 183-226. Zbl 0676.54012, MR 1014427
Reference: [9] Lowen R.: Kuratowski's measure of non-compactness revisited.Quart. J. Math. Oxford 39:2 (1988), 235-254. Zbl 0672.54025, MR 0947504
Reference: [10] Lowen R., Robeys K.: Completion of products of metric spaces.Quart. J. Math. Oxford 43:2 (1992), 319-338. MR 1176491
Reference: [11] Kuratowski C.: Sur les espaces complets.Fund. Math. 15 (1930), 301-309.
Reference: [12] Steen L.A., Seebach J.A., Jr.: Counterexamples in Topology.Holt, Rinehart and Winston, Inc, 1970. Zbl 0386.54001, MR 0266131
Reference: [13] Thron W.J.: Topological Structures.Holt, Rinehart and Winston, 1966. Zbl 0137.15402, MR 0200892
Reference: [14] Wilansky A.: Topology for Analysis.Ginn, Waltham, Massachusetts, Toronto, London, 1970. Zbl 0512.54001, MR 0451181
Reference: [15] Willard S.: General Topology.Addison-Wesley Series in Mathematics, Reading, Massachusetts, 1970. Zbl 1052.54001, MR 0264581
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