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Networks for the weak topology of Banach and Fréchet spaces

  1. 1.
    0446776 - MÚ 2016 RIV US eng J - Článek v odborném periodiku
    Gabriyelyan, S. - Kąkol, Jerzy - Kubiś, Wieslaw - Marciszewski, W.
    Networks for the weak topology of Banach and Fréchet spaces.
    Journal of Mathematical Analysis and Applications. Roč. 432, č. 2 (2015), s. 1183-1199. ISSN 0022-247X. E-ISSN 1096-0813
    Grant CEP: GA ČR(CZ) GA14-07880S
    Institucionální podpora: RVO:67985840
    Klíčová slova: Fréchet space * space of continuous functions * locally convex space
    Kód oboru RIV: BA - Obecná matematika
    Impakt faktor: 1.014, rok: 2015
    http://www.sciencedirect.com/science/article/pii/S0022247X15006836

    We start the systematic study of Fréchet spaces which are ...-spaces in the weak topology. A topological space X is an ...-space or an ...-space if X has a countable k-network or a sigma-locally finite k -network, respectively. We are motivated by the following result of Corson (1966): If the space Cc(X)Cc(X) of continuous real-valued functions on a Tychonoff space X endowed with the compact-open topology is a Banach space, then Cc(X)Cc(X) endowed with the weak topology is an ...-space if and only if X is countable. We extend Corson's result as follows: If the space ... is a Fréchet lcs, then E endowed with its weak topology sigma(E,E′)sigma(E,E′) is an ...-space if and only if ... is an ...-space if and only if X is countable. We obtain a necessary and some sufficient conditions on a Fréchet lcs to be an ...-space in the weak topology.
    Trvalý link: http://hdl.handle.net/11104/0248746

     
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