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The Extent of the Sequence Space Associated with a Basis

Published online by Cambridge University Press:  20 November 2018

William H. Ruckle*
Affiliation:
Clemson University, Clemson, South Carolina
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The associated sequence space S of a sequence of vectors {xn} in a Banach space consists of all scalar sequences (sn) for which converges. My primary motivation in writing this paper was to present a new proof to a recent theorem of N. I. and V. I. Gurarii concerning limits of extent on S when {xn} is a basis of a uniformly convex or a uniformly smooth Banach space [5], This theorem is stated as Theorem 2.4. Several interesting consequences of this theorem were noted by N. I. Gurarii in [3] and [4].

Type
Research Article
Copyright
Copyright © Canadian Mathematical Society 1972

References

1. Day, M. M., Uniform convexity in factor and conjugate spaces, Ann. of Math. 45 (1944), 375385.Google Scholar
2. Day, M. M., Normed linear spaces (Academic Press, New York, 1962).Google Scholar
3. Gurarii, N. I., On sequences of coefficients of expansion by a basis in Hilbert and Banach spaces, Izv. Akad. Nauk SSR Ser. Math. 84 (1970), 216223.Google Scholar
4. Gurarii, N. I., Some theorems on bases in Hilbert and Banach spaces, Dokl. Akad. Nauk SSSR 193 (1970), 974–977, Soviet Math. Dokl. 11 (1970), 10421045.Google Scholar
5. Gurarii, N. I. and Gurarii, V. I., On bases in uniformly convex and uniformly smooth Banach spaces, Izv. Akad. Nauk SSSR Ser. Math. 34 (1970), 210215.Google Scholar
6. McGivney, R. J. and Ruckle, W., Multiplier algebras of biorthogonal systems, Pacific J. Math. 29 (1969), 375387.Google Scholar
7. Ruckle, W. H., On the construction of sequence spaces that have Schauder bases, Can. J. Math. 18 (1966), 12811293.Google Scholar
8. Ruckle, W. H., Symmetric coordinate spaces and symmetric bases, Can. J. Math. 19 (1967), 828838.Google Scholar
9. Ruckle, W. H., On perfect symmetric BK-spaces, Math. Ann. 175 (1968), 121126.Google Scholar
10. Ruckle, W. H., Diagonals of operators, Studia Math. 38 (1970), 4349.Google Scholar
11. Ruckle, W. H., Representation and series summability of complete biorthogonal sequences, Pacific J. Math. 34 (1970), 511528.Google Scholar
12. Sargent, W. L. C., Some sequence spaces related to the lp spaces, J. London Math. Soc. 35 (1960), 161171.Google Scholar
13. Ivan, Singer, Bases in Banach spaces (Springer, Berlin-Heidelberg-New York, 1970).Google Scholar
14. Wilansky, A., Functional analysis (Blaisdell, New York, 1964).Google Scholar