Domain-complete and LCS-complete Spaces

Domain-complete and LCS-complete Spaces
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DOI:
10.1016/j.entcs.2019.07.014
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发表时间:
2019-02
期刊:
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通讯作者:
Matthew de Brecht;J. Goubault-Larrecq;Xiaodong Jia;Zhenchao Lyu
Matthew de Brecht;J. Goubault-Larrecq;Xiaodong Jia;Zhenchao Lyu
中科院分区:
其他
文献类型:
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作者:
Matthew de Brecht;J. Goubault-Larrecq;Xiaodong Jia;Zhenchao Lyu

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我们研究连续 dcpos 的 G δ 子空间,我们称之为域完备空间,以及局部紧致清醒空间的 G δ 子空间,我们称之为 LCS 完备空间。这些包括所有局部紧致清醒空间(特别是所有连续 dcpos)、所有 Čech 意义上的拓扑完备空间,以及所有准波兰空间(特别是所有波兰空间)。我们证明 LCS 完备空间是清醒的、Wilker 的、紧 Choquet 完备的、完全 Baire 的、以及 ⊙-辅音的——特别是辅音;基于可数的 LCS 完备(或域完备)空间正是准波兰空间;并且可度量的 LCS 完备(或域完备)空间是完全可度量的空间。我们包括两个应用:在 LCS 完备空间上,所有连续估值都扩展到测度,并且次线性预测形成与连续估值空间的凸霍尔幂域同胚的空间。
We study G δ subspaces of continuous dcpos, which we call domain-complete spaces, and G δ subspaces of locally compact sober spaces, which we call LCS-complete spaces. Those include all locally compact sober spaces—in particular, all continuous dcpos—, all topologically complete spaces in the sense of Čech, and all quasi-Polish spaces—in particular, all Polish spaces. We show that LCS-complete spaces are sober, Wilker, compactly Choquet-complete, completely Baire, and⊙-consonant—in particular, consonant; that the countably-based LCS-complete (resp., domain-complete) spaces are the quasi-Polish spaces exactly; and that the metrizable LCS-complete (resp., domain-complete) spaces are the completely metrizable spaces. We include two applications: on LCS-complete spaces, all continuous valuations extend to measures, and sublinear previsions form a space homeomorphic to the convex Hoare powerdomain of the space of continuous valuations.