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On the H -property of some Banach sequence spaces

Suthep Suantai — 2003

Archivum Mathematicum

In this paper we define a generalized Cesàro sequence space ces ( p ) and consider it equipped with the Luxemburg norm under which it is a Banach space, and we show that the space ces ( p ) posses property (H) and property (G), and it is rotund, where p = ( p k ) is a bounded sequence of positive real numbers with p k > 1 for all k N .

On the H-property and rotundity of Cesàro direct sums of Banach spaces

Saard YouyenSuthep Suantai — 2008

Banach Center Publications

In this paper, we define the direct sum ( i = 1 n X i ) c e s p of Banach spaces X₁,X₂,..., and Xₙ and consider it equipped with the Cesàro p-norm when 1 ≤ p < ∞. We show that ( i = 1 n X i ) c e s p has the H-property if and only if each X i has the H-property, and ( i = 1 n X i ) c e s p has the Schur property if and only if each X i has the Schur property. Moreover, we also show that ( i = 1 n X i ) c e s p is rotund if and only if each X i is rotund.

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