CSC空间的弱伪对话性

IF 0.5 3区 数学 Q3 MATHEMATICS
Hector Barrig-Acosta, A. Dow
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引用次数: 0

摘要

本文证明了在GCH+模型上由最终性质为K的偏序集强制扩张时,每个紧序列紧空间都是弱伪度空间。这改进了[?dow1996more]中的定理4。我们还证明了以下假设s≤Ş2:(i)如果X是紧致弱伪标度,则X是伪标度当且仅当X不能映射到[0,1]s上;(ii)如果X和Y是紧致伪刻度空间,使得X×Y是弱伪刻度,那么X×Y就是伪刻度。这一结果增加了Gerlits和Nagy关于两个紧致伪刻度空间的乘积是否是伪刻度的问题的各种各样的部分答案。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
On the weak pseudoradiality of CSC spaces
In this paper we prove that in forcing extensions by a poset with finally property K over a model of GCH+ , every compact sequentially compact space is weakly pseudoradial. This improves Theorem 4 in [?dow1996more]. We also prove the following assuming s ≤ א2: (i) if X is compact weakly pseudoradial, then X is pseudoradial if and only if X cannot be mapped onto [0, 1]s; (ii) if X and Y are compact pseudoradial spaces such that X × Y is weakly pseudoradial, then X × Y is pseudoradial. This results add to the wide variety of partial answers to the question by Gerlits and Nagy of whether the product of two compact pseudoradial spaces is pseudoradial.
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来源期刊
Fundamenta Mathematicae
Fundamenta Mathematicae 数学-数学
CiteScore
1.00
自引率
0.00%
发文量
44
审稿时长
6-12 weeks
期刊介绍: FUNDAMENTA MATHEMATICAE concentrates on papers devoted to Set Theory, Mathematical Logic and Foundations of Mathematics, Topology and its Interactions with Algebra, Dynamical Systems.
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