一句话:证明每个局部紧可分离度量空间都存在强 proper dyadic 子基,从而获得可容许的 domain 表示。
本文研究拓扑空间的 dyadic 子基及其诱导的 domain 表示。给定带固定枚举的 dyadic 子基,可为空间中的点编码并得到 domain 表示;已知强 proper dyadic 子基无论枚举如何都能诱导可容许的 domain 表示。论文的中心问题是:哪些空间保证拥有这样的强 proper dyadic 子基。作者证明,每个局部紧可分离度量空间都存在强 proper dyadic 子基。这一结果将强 proper 子基的存在性推广到局部紧可分离度量空间,为相应空间的域表示提供了拓扑基础。
We consider a topological space with its subbase which induces a coding for each point. Every second-countable Hausdorff space has a subbase that is the union of countably many pairs of disjoint open subsets. A dyadic subbase is such a subbase with a fixed enumeration. If a dyadic subbase is given, then we obtain a domain representation of the given space. The properness and the strong properness of dyadic subbases have been studied, and it is known that every strongly proper dyadic subbase induces an admissible domain representation regardless of its enumeration. We show that every locally compact separable metric space has a strongly proper dyadic subbase.Comment: 11 pages