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On minimal sequences of type $$l_+$$ and bounded biorthogonal systems in Banach spaces. (English) Zbl 0273.46010

##### MSC:
 46B15 Summability and bases; functional analytic aspects of frames in Banach and Hilbert spaces 46B10 Duality and reflexivity in normed linear and Banach spaces
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##### References:
 [1] S. Banach: Théorie des opérations linéaires. Monografje Matematyczne, Warszawa, 1932. · Zbl 0005.20901 [2] A. Pelczynski: A note on the paper of I. Singer ”Basic sequences and reflexivity of Banach spaces”. Studia Math., 21, 1962, 371-374. · Zbl 0114.30904 [3] V. Pták: Biorthogonal systems and reflexivity of Banach spaces. Czechoslovak Math. J. 9, 1959, 319-326. · Zbl 0114.30901 [4] I. Singer: Basic sequences and reflexivity of Banach spaces. Studia Math. 21, 1962, 351 - 369. · Zbl 0114.30903 [5] I. Singer: Bases in Banach spaces. II. (in Romanian) Studii şi cercet. mat. 15, 1964, 157-208.
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