On the three space problems for countable barrelendness

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On the three space problems for countable barrelendness

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Title: On the three space problems for countable barrelendness
Author: García Lafuente, José María; Meléndez Rocha, María Yolanda
Abstract: Let F be a closed subspace of a Hausdorff locally convex space E such that F and the Hausdorff quotient E/F enjoy a property (M). Does the whole space E enjoy (M)?. This problem is called "the three-space-problem" and it is a common problem in the framework of twisted exact sequences {see I3I). It is been already considered by several authors, e.g. IPBI, I4I. ln the present paper we shall provide a negative answer to the problem for IP -quasi-barrelledness, lP Є {Xo, l∞, c, co} and for df spaces. We shall also supply a thoroughly positive answer for l∞-barrelledness and a partial affirmative answer for Co-barrelledness.
URI: http://hdl.handle.net/10662/4548
Date: 2016-07-29


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