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arXiv 2202.02536math.FA
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局部实心收敛与正算子的序连续性

Locally solid convergences and order continuity of positive operators

Eugene Bilokopytov

AI总结:

本文研究向量格上的局部实心收敛结构,刻画序收敛与 uo 收敛,推广无界修正结果,并建立正算子序连续性在稠密正则子格上的判定条件及反例。

摘要:

我们考虑赋予局部实心收敛结构(不必是拓扑的)的向量格。我们证明这种收敛由正锥上收敛到 0 来定义。此前仅在部分情形中可用的一些关于无界修正的结果得到了推广。序收敛被刻画为最强的局部实心收敛,在该收敛中单调网收敛到其极值(若极值存在)。我们部分刻画了这样一些子格:在这些子格上,序收敛是环境格序收敛的限制。我们证明同态是序连续的当且仅当它是 uo-连续的。Uo 收敛得到了独立于序收敛的刻画。我们证明,在连续函数空间上,uo 收敛弱于紧开拓扑收敛,当且仅当底层拓扑空间包含一个稠密的局部紧子空间。对于一大类收敛,我们证明正算子序连续当且仅当其在稠密正则子格上的限制序连续,并且正则子格的闭包是正则的,原子格在该闭包中序稠密。我们还给出一个局部实心拓扑向量格的正则子格的例子,其闭包不是正则的。

英文摘要:

We consider vector lattices endowed with locally solid convergence structures, which are not necessarily topological. We show that such a convergence is defined by the convergence to $0$ on the positive cone. Some results on unbounded modification which were only available in partial cases are generalized. Order convergence is characterized as the strongest locally solid convergence in which monotone nets converge to their extremums (if they exist). We partially characterize sublattices on which the order convergence is the restriction of the order convergence of the ambient lattice. We show that homomorphism is order continuous iff it is uo-continuous. Uo convergence is characterized independently of order convergence. We show that on the space of continuous function uo convergence is weaker than the compact open convergence iff the underlying topological space contains a dense locally compact subspace. For a large class of convergences we prove that a positive operator is order continuous if and only if its restriction to a dense regular sublattice is order continuous, and that the closure of a regular sublattice is regular with the original sublattice being order dense in the closure. We also present an example of a regular sublattice of a locally solid topological vector lattice whose closure is not regular.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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