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On Star-σ-Countably Compact Spaces


Affiliations
1 Department of Mathematics, Dyal Singh College, University of Delhi, New Delhi-110003, India
     

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A space X is said to be star-σ-countably compact if for every open cover U of X, there exists a σ-countably compact subset C of X such that St(C, U) = X. In this paper, we investigate the relationship between star-σ-countably compact spaces and other related spaces and also study the topological properties of star-σ-countably compact spaces.

Keywords

Compact, Starcompact, σ-Countably Compact, Lindel¨of, Covering, Star-Covering, Topological Space.
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  • E. K. van Douwen, G. K. Reed, A. W. Roscoe and I. J. Tree, Star covering properties, Topology Appl., 39 (1991), 71–103.
  • R. Engelking, General topology, PWN, Warszawa, 1977.
  • W. M. Fleischman, A new extension of countable compactness, Fund. math., 67 (1971), 1–7.
  • M. V. Matveev, A survey on star-covering properties, Topology Atlas, preprint no. 330, 1998.
  • S. Mr´owka, On completely regular spaces, Fund. Math., 41 (1954), 105–106.
  • S. Singh, Set starcompact and related spaces, Afr. Mat., 32 (2021), 1389–1397.
  • Y. K. Song and Yin Zheng, On star-C-Menger spaces, Quaestiones Mathematicae, 37 (2014), 337–347.
  • Y. K. Song, On L-starcompact spaces, Czech. Math. J., 56 (2006), 781–788.
  • Y. K. Song, On K-starcompact spaces, Bull. Malays. Math. Sci. Soc., 30 (2007), 59–64.
  • Y. K. Song, On C-starcompact spaces, Math. Bohemica, 133 (2008), 259–266.
  • Y. K. Song, On σ-starcompact spaces, App. Gen. Topol., 9(2) (2008), 293–299.
  • R. C. Walker, The stone-Cech compactification, Berlin, 1974.

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  • On Star-σ-Countably Compact Spaces

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Authors

Sumit Singh
Department of Mathematics, Dyal Singh College, University of Delhi, New Delhi-110003, India

Abstract


A space X is said to be star-σ-countably compact if for every open cover U of X, there exists a σ-countably compact subset C of X such that St(C, U) = X. In this paper, we investigate the relationship between star-σ-countably compact spaces and other related spaces and also study the topological properties of star-σ-countably compact spaces.

Keywords


Compact, Starcompact, σ-Countably Compact, Lindel¨of, Covering, Star-Covering, Topological Space.

References