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О максимальном квазинормированном расширении квазинормированных векторных решеток
Kusraev, Тасоев
Владикавказский математический журнал18 Sep 2017Open access
NobleIDark:/48914/w1/20260522/903F5A22DOI10.23671/vnc.2017.3.7111
О максимальном квазинормированном расширении квазинормированных векторных решеток
Kusraev, Тасоев · Владикавказский математический журнал · 18 Sep 2017
NobleIDark:/48914/w1/20260522/903F5A22DOI10.23671/vnc.2017.3.7111
Abstract
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The purpose of this article is to extend the Abramovich's construction of a maximal normed extension of a normed lattice to quasi-Banach setting. It is proved that the maximal quasi-normed extension $X^\varkappa$ of a Dedekind complete quasi-normed lattice $X$ with the weak $\sigma$-Fatou property is a quasi-Banach lattice if and only if $X$ is intervally complete. Moreover, $X^\varkappa$ has the Fatou and the Levi property provided that $X$ is a Dedekind complete quasi-normed space with the Fatou property. The possibility of applying this construction to the definition of a space of weakly integrable functions with respect to a measure taking values from a quasi-Banach lattice is also discussed, since the duality based definition does not work in the quasi-Banach setting.