各种类型的Supra预紧和Supra Pre-Lindelöf空间

IF 0.4 Q4 MATHEMATICS
T. Al-shami, Baravan A. Asaad, M. El-Gayar
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引用次数: 11

摘要

本文的目的是通过基于超预开集的超拓扑空间引入三类超紧性和三类超林德洛夫性。借助实例,我们说明了它们之间的关系,并展示了它们与[3]中给出的一些超紧性和超林德洛夫性的关系。我们刻画了每种类型的空间,并研究了它们在预不决映射下的映象。此外,我们还证明了这些空间在有限乘积空间下是守恒的,并给出了超紧空间、几乎超紧空间和超预紧空间等价的充分条件。在每一节的结尾,我们都提供了一些例子来证明所研究的空间和[9]中引入的对应空间是相互独立的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Various Types of Supra Pre-compact and Supra Pre-Lindelöf Spaces
The purpose of this article is to introduce three types of supra compactness and three types of supra Lindelofness via supra topological spaces based on the supra pre-open sets. With the help of examples, we illustrate the relationships among them and show their relationships with some kinds of supra compactness and supra Lindelofness given in [3]. We characterize each type of space and investigate the image of them under pre-irresolute mappings. Also, we prove that these spaces are preserved under the finite product spaces, and give a sufficient condition for the equivalence among supra compact, almost supra compact and supra pre-compact spaces. At the end of each section, we provide some examples to demonstrate that the spaces studied and their counterparts, introduced in [9], are independent of each other.
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来源期刊
CiteScore
0.90
自引率
0.00%
发文量
9
期刊介绍: Missouri Journal of Mathematical Sciences (MJMS) publishes well-motivated original research articles as well as expository and survey articles of exceptional quality in mathematical sciences. A section of the MJMS is also devoted to interesting mathematical problems and solutions.
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