Zhongqiang Yang

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20202026

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3 papers · 1 filter

math.GN2026

Axioms of Continuous Separation

Zhongqiang Yang, Nada Wu

For a $T_{1}$ -space $X$ , let $C l d (X)$ denote all its nonempty closed subsets and $T_{4} (X) = {(F_{1}, F_{2}) \in C l d (X)^{2} : F_{1} \cap F_{2} = \emptyset}$ . In terms of closed sets, $X$ is $T_{4}$ iff f…

math.GN2022

Quasiexact posets and the moderate meet-continuity

Zhaorong He, Zhongqiang Yang, Dongsheng Zhao

The study of weak domains and quasicontinuous domains leads to the consideration of two types generalizations of domains. In the current paper, we define the weak way-below relatio…

math.GN2020

Coincidence of the upper Vietoris topology and the Scott topology

Xiaoquan Xu, Zhongqiang Yang

For a $T_{0}$ space $X$ , let $\mk (X)$ be the poset of all compact saturated sets of $X$ with the reverse inclusion order. The space $X$ is said to have property Q if for any $K_1, K…