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Barrelledness of Generalized Sums of Normed Spaces
Authors:A Fernández  M Florencio  J Oliveros
Institution:(1) Dpto Matemática Aplicada II, Escuela Superior Ingenieros, Camino de los Descubrimientos, s/n, 41092- Sevilla, Spain.;(2) Dpto Matemática Aplicada II, Escuela Superior Ingenieros, Camino de los Descubrimientos, s/n, 41092- Sevilla, Spain
Abstract:Let (E i ) iisinI be a family of normed spaces and lambda a space of scalar generalized sequences. The lambda-sum of the family (E i ) iisinI of spaces is

$$\lambda \left\{ {\left( {E_i } \right)_{i \in I} } \right\}: = \left\{ {\left( {x_i } \right)_{i \in I} ,x_i \in E_i ,{\text{ and }}\left( {\left\| {x_i } \right\|} \right)_{i \in I} \in \lambda } \right\}.$$
Starting from the topology on lambda and the norm topology on each E i , a natural topology on lambda{(E i ) iisinI } can be defined. We give conditions for lambda{(E i ) iisinI } to be quasi-barrelled, barrelled or locally complete.
Keywords:barrelled spaces  generalized sequences
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