Abstract
The notion of \(\mu\)-monotonically T2 spaces is introduced, which is a generation of monotone T2 separation in general topological spaces. The characterization and some properties of \(\mu\)-monotonically T2 spaces are given. Besides, the definition of the box product of the topologies is extended to generalized topologies, and we prove that the box product of \(\mu\)-monotonically T2 spaces is \(\mu\)-monotonically T2.
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References
Appert, A.: Espaces uniformes généralisés. C. R. Acad. Sci. Paris 222, 986–988 (1946)
Buck, R.E.: Some weaker monotone separation and basis properties. Topology Appl. 69, 1–12 (1996)
P. M. Cohn, Universal Algebra, Harper's Series in Modern Math., Harper and Row (New York etc., 1965)
Császár, Á.: Generalized open sets. Acta Math. Hungar. 75, 65–87 (1997)
Császár, Á.: Generalized topology, generalized continuity. Acta Math. Hungar. 96, 351–357 (2002)
Császár, Á.: Extremally disconnected generalized topologies. Ann. Univ. Sci. Budapest. Eötvös Sect. Math. 47, 1–96 (2004)
Császár, Á.: Separation axioms for generalized topologies. Acta Math. Hungar. 104, 63–69 (2004)
Császár, Á.: Generalized open sets in generalized topologies. Acta Math. Hungar. 106, 53–66 (2005)
Császár, Á.: Normal generalized topologies. Acta Math. Hungar. 115, 309–313 (2007)
Császár, Á.: Product of generalized topologies. Acta Math. Hungar. 123, 127–132 (2009)
J. Eckhoff, Radon's theorem in products of convexity structures. I, II, Monatsh. Math., 72 (1968), 303–314; 73 (1969), 7–30 (in German)
Closure relation, in: Encyclopedia of Math., Vol. 2, Kluwer (Dordrecht, 1988), p. 167
Ge, X., Ge, Y.: \(\mu \)-separations in generalized topological spaces. Acta Math. Hungar. 25, 243–252 (2010)
Kay, D.C., Womble, E.W.: Axiomatic convexity theory and relationships between the Carathéodory, Helly and Radon numbers. Pacific J. Math. 38, 471–485 (1971)
A. G. Kurosh, Lectures on General Algebra, Chelsea (New York, 1963)
Levi, F.W.: On Helly's theorem and the axioms of convexity. J. Indian Math. Soc. 15, 65–76 (1951)
Levine, N.: Semi-open sets and semi-continuity in topological spaces. Amer. Math. Monthly 70, 36–41 (1963)
Lugojan, S.: Generalized topologies. Stud. Cerc. Mat. 34, 348–360 (1982). (in Roumanian)
Maheshwari, S.N., Prasad, R.: Some new separation axioms. Ann. Soc. Sci. Bruxelles 89, 395–402 (1975)
E. Makai, Jr., E. Peyghan and B. Samadi, Weak and strong structures and the \(T_{3.5}\) property for generalized topological spaces, Acta Math. Hungar., 150 (2016), 1–35
Mashhour, A.S., Allam, A.A., Mahmoud, F.S., Khedr, F.H.: On supratopological spaces. Indian J. Pure Appl. Math. 14, 502–510 (1983)
E. H. Moore, The New Haven Colloquium (1906), Part I: Introduction to a form of general analysis, Colloq. Publ. Amer. Math. Soc. vol. 2, Yale Univ. Press (New Haven, 1910)
T. S. Motzkin, Linear Inequalities, Mimeographed Lecture Notes, Univ. of California (Los Angeles, 1951)
Noiri, T.: Semi-normal spaces and some functions. Acta Math. Hungar. 65, 305–311 (1994)
Sarsak, M.S.: Weak separation axioms in generalized topological spaces. Acta Math. Hungar. 131, 110–121 (2011)
V. P. Soltan, Introduction to the Axiomatic Theory of Convexity, Shtiintsa (Kishinev, 1984) (in Russian)
Sun, W.H., Wu, J.C., Zhang, X.: Monotone normality in generalized topological spaces. Acta Math. Hungar. 153, 408–416 (2017)
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The author is grateful to the anonymous referee for valuable comments and suggestions.
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This research is supported by Natural Science Foundation of Shandong Province(Grant No. ZR2019MA051) and National Natural Science Foundation of China–Shandong joint fund (No. U1806203) and the Fundamental Research Funds for the Central Universities (No. 2019ZRJC005) and National Natural Science Foundation of China (Grant No. 11501328).
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Sun, W.H. Generalized monotonically T2 spaces. Acta Math. Hungar. 162, 32–39 (2020). https://doi.org/10.1007/s10474-020-01091-w
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DOI: https://doi.org/10.1007/s10474-020-01091-w