arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2001.01663math.FAmath.LO
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一致有界性原理的滤波器相关版本

Filter-dependent versions of the Uniform Boundedness Principle

Ben De Bondt, Hans Vernaeve

摘要:

对于$\mathbb N$上的每一个滤子$\mathcal F$,我们引入并研究了相应的局部凸拓扑向量空间的一致$\mathcal F$ -有界原理.当滤子$\mathcal F$等于$\mathbb N$的余有限子集的Fréchet滤子时,这些原理与连续线性映射序列的经典一致有界性原理一致,从而推广了经典一致有界性原理。我们确定组合性质的过滤器$\mathcal F$,以确保这些统一的$\mathcal F$有界性原则,每一个Fréchet空间。此外,对于几种类型的Fréchet空间,我们还隔离的$\mathcal F$,这些统一的$\mathcal F$有界性原则的有效性是必要的性质。对于每一个无限维的巴拿赫空间$X$,我们以这种方式获得这些过滤器$\mathcal F$,相应的一致$\mathcal F$ -有界性原则保持为真的$X$的精确组合特征。

英文摘要:

For every filter $\mathcal F$ on $\mathbb N$, we introduce and study corresponding uniform $\mathcal F$-boundedness principles for locally convex topological vector spaces. These principles generalise the classical uniform boundedness principles for sequences of continuous linear maps by coinciding with these principles when the filter $\mathcal F$ equals the Fréchet filter of cofinite subsets of $\mathbb N$. We determine combinatorial properties for the filter $\mathcal F$ which ensure that these uniform $\mathcal F$-boundedness principles hold for every Fréchet space. Furthermore, for several types of Fréchet spaces, we also isolate properties of $\mathcal F$ that are necessary for the validity of these uniform $\mathcal F$-boundedness principles. For every infinite-dimensional Banach space $X$, we obtain in this way exact combinatorial characterisations of those filters $\mathcal F$ for which the corresponding uniform $\mathcal F$-boundedness principles hold true for $X$.

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