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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 2024 MCQ for Proceedings of the American Mathematical Society is 0.85.

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A nonstandard characterization of weak convergence
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by Robert M. Anderson and Salim Rashid
Proc. Amer. Math. Soc. 69 (1978), 327-332
DOI: https://doi.org/10.1090/S0002-9939-1978-0480925-X

Abstract:

Let X be any topological space, and $C(X)$ the space of bounded continuous functions on X. We give a nonstandard characterization of weak convergence of a net of bounded linear functionals on $C(X)$ to a tight Baire measure on X. This characterization applies whether or not the net or the individual functionals in the net are tight. Moreover, the characterization is expressed in terms of the values of an associated net of countably additive measures on all Baire sets of X; no distinguished family, such as the family of continuity sets of the limit, is involved. As a corollary, we obtain a new proof that a tight set of measures is relatively weakly compact.
References
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Bibliographic Information
  • © Copyright 1978 American Mathematical Society
  • Journal: Proc. Amer. Math. Soc. 69 (1978), 327-332
  • MSC: Primary 28A32; Secondary 02H25, 60B10
  • DOI: https://doi.org/10.1090/S0002-9939-1978-0480925-X
  • MathSciNet review: 0480925