Coincidence of the Isbell and Scott topologies on domain function spaces

Coincidence of the Isbell and Scott topologies on domain function spaces
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Isbell 和 Scott 拓扑在域函数空间上的重合

DOI:
10.1016/j.topol.2014.01.002
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发表时间:
2014-03
影响因子:
0.6
通讯作者:
Yang Jinbo
Yang Jinbo
中科院分区:
数学4区
文献类型:
--
作者:
Xi Xiaoyong;Yang Jinbo

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设[X→ L]是从拓扑空间X到定义域L的所有点态序连续映射的集合。设Is [X→ L],σ [X→ L]分别为[X→ L]上的Isbell和Scott拓扑.本文考虑了[X→ L]上Isbell拓扑和Scott拓扑何时重合的问题.主要结果是:(1)若L是双完备域,则(i)对所有核紧空间X,Is [X→ L]= σ [X→ L]当且仅当L是有界完备的;(ii)对所有核紧空间和紧空间X,Is [X→ L]= σ [X→ L]当且仅当L是条件有界完备的. (2)设L是由一个最小元和一个具有两个下界的减序列组成的dcpo,则对所有具有可数基的核紧空间X,Is [X→ L]= σ [X→ L]. (3)设X是良根Lawson紧整环,L是FL-整环,则Is [X→ L]= σ [X→ L].
Abstract Let [X→ L] be the set of all continuous mappings from a topological space X to a domain L with the pointwise order. Let Is [X→ L], σ [X→ L] be the Isbell and Scott topologies on [X→ L] respectively. In this paper, the question of when the Isbell and Scott topologies coincide on [X→ L] is considered. Main results are:(1) If L is a bicomplete domain, then (i) Is [X→ L]= σ [X→ L] for all core compact spaces X if and only if L is bounded complete;(ii) Is [X→ L]= σ [X→ L] for all core compact and compact spaces X if and only if L is conditionally bounded complete.(2) Let L be a dcpo consisting of a least element and a decreasing sequence with two lower bounds, then Is [X→ L]= σ [X→ L] for all core compact spaces X with a countable base.(3) Let X be a well rooted Lawson compact domain and L an FL-domain, then Is [X→ L]= σ [X→ L].
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