Characterizing filters by convergence (with respect to filters) in Banach spaces |
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Authors: | S García-Ferreira HS Pino-Villela |
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Institution: | Instituto de Matemáticas, Universidad Nacional Autónoma de México, Apartado Postal 61-3, Xangari, 58089 Morelia, Michoacán, Mexico |
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Abstract: | Let X be a topological space and let F be a filter on N, recall that a sequence (xn)n∈N in X is said to be F-convergent to the point x∈X, if for each neighborhood U of x, {n∈N:xn∈U}∈F. By using F-convergence in ?1 and in Banach spaces, we characterize the P-filters, the P-filters+, the weak P-filters, the Q-filters, the Q-filters+, the weak Q-filters, the selective filters and the selective+ filters. |
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Keywords: | primary 03E75 40A30 46B45 secondary 46B25 46N99 |
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