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Proceedings of the American Mathematical Society

Published by the American Mathematical Society since 1950, Proceedings of the American Mathematical Society is devoted to shorter research articles in all areas of pure and applied mathematics.

ISSN 1088-6826 (online) ISSN 0002-9939 (print)

The 2020 MCQ for Proceedings of the American Mathematical Society is 0.85.

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Normality and paracompactness of the Fell topology
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by L’. Holá, S. Levi and J. Pelant PDF
Proc. Amer. Math. Soc. 127 (1999), 2193-2197 Request permission

Abstract:

Let $X$ be a Hausdorff topological space and $CL(X)$ the hyperspace of all closed nonempty subsets of $X$. We show that the Fell topology on $CL(X)$ is normal if and only if the space $X$ is Lindelöf and locally compact. For the Fell topology normality, paracompactness and Lindelöfness are equivalent.
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Additional Information
  • L’. Holá
  • Affiliation: Mathematical Institute, Slovak Academy of Sciences, Štefániková 49 Bratislava, Slovakia
  • Email: hola@mau.savba.sk
  • S. Levi
  • Affiliation: Dipartimento di Matematica, Universita di Milano, Via C. Saldini 50, 20133 Milano, Italy
  • Email: slevi@vmimat.mat.unimi.it
  • J. Pelant
  • Affiliation: Mathematical Institute, Czech Academy of Sciences, Žitná 25, 115 67 Praha, Czech republic
  • Email: pelant@beba.cesnet.cz
  • Received by editor(s): February 12, 1997
  • Received by editor(s) in revised form: October 7, 1997
  • Published electronically: March 1, 1999
  • Additional Notes: The third author was partially supported by the grant GACR 201/94/0069 and the grant 119 401 of Acad. Sci. CR
  • Communicated by: Alan Dow
  • © Copyright 1999 American Mathematical Society
  • Journal: Proc. Amer. Math. Soc. 127 (1999), 2193-2197
  • MSC (1991): Primary 54B20
  • DOI: https://doi.org/10.1090/S0002-9939-99-04737-1
  • MathSciNet review: 1485480