一句话:引入开放良滤空间,证明核紧开放良滤空间是sober的,从而解决Jia-Jung公开问题。
本文研究 T0 空间中的 well-filtered 性与 sober 性之间关系,特别是 Jia 和 Jung 提出的公开问题:每个 core-compact well-filtered 空间是否都是 sober 的。作者引入了一类新的 T0 空间——开放良滤空间,并证明每个 well-filtered 空间都是开放良滤空间;进一步证明每个 core-compact 的开放良滤空间都是 sober 的。由此立即推出每个 core-compact well-filtered 空间都是 sober 的,为原公开问题提供了一个不同且相对直接的解决方法。
We introduce and study a new class of $T_0$ spaces, called open well-filtered spaces. The main results we proved include (1) every well-filtered space is an open well-filtered space; (2) every core-compact open well-filtered space is sober. As an immediate corollary, we deduce that every core-compact well-filtered space is sober. This provides another different and relatively more straight forward method to answer the open problem posed by Jia and Jung: Is every core-compact well-filtered space sober?
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@article{ShenXXZ20,
title = {On open well-filtered spaces},
author = {Chong Shen and Xiaoyong Xi and Xiaoquan Xu and Dongsheng Zhao},
journal = {Logical Methods in Computer Science},
volume = {Volume 16, Issue 4},
year = {2020},
doi = {10.23638/lmcs-16(4:18)2020}
}