{"title":"Strong uniform and strong Whitney convergences on C(X,Y)","authors":"Tarun Kumar Chauhan","doi":"10.1016/j.topol.2025.109526","DOIUrl":null,"url":null,"abstract":"<div><div>For any two metric spaces <span><math><mo>(</mo><mi>X</mi><mo>,</mo><mi>d</mi><mo>)</mo></math></span>, <span><math><mo>(</mo><mi>Y</mi><mo>,</mo><mi>ρ</mi><mo>)</mo></math></span> and a bornology <span><math><mi>B</mi></math></span> on <em>X</em>, we investigate particular subsets of <span><math><mi>C</mi><mo>(</mo><mi>X</mi><mo>,</mo><mi>Y</mi><mo>)</mo></math></span> which are clopen under the topology <span><math><msubsup><mrow><mi>τ</mi></mrow><mrow><mi>B</mi></mrow><mrow><mi>s</mi><mi>w</mi></mrow></msubsup></math></span> of strong Whitney convergence on bornology and the topology <span><math><msubsup><mrow><mi>τ</mi></mrow><mrow><mi>B</mi></mrow><mrow><mi>s</mi></mrow></msubsup></math></span> of strong uniform convergence on bornology. We show that the space <span><math><mi>C</mi><mo>(</mo><mi>X</mi><mo>,</mo><mi>Y</mi><mo>)</mo></math></span> endowed with these topologies is not generally connected. In the process, we also provide new characterizations for the notions of shields and bornology that are shielded from closed sets, using these particular subsets of <span><math><mi>C</mi><mo>(</mo><mi>X</mi><mo>,</mo><mi>Y</mi><mo>)</mo></math></span>.</div></div>","PeriodicalId":51201,"journal":{"name":"Topology and its Applications","volume":"373 ","pages":"Article 109526"},"PeriodicalIF":0.5000,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Topology and its Applications","FirstCategoryId":"100","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0166864125003244","RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATHEMATICS","Score":null,"Total":0}
引用次数: 0
Abstract
For any two metric spaces , and a bornology on X, we investigate particular subsets of which are clopen under the topology of strong Whitney convergence on bornology and the topology of strong uniform convergence on bornology. We show that the space endowed with these topologies is not generally connected. In the process, we also provide new characterizations for the notions of shields and bornology that are shielded from closed sets, using these particular subsets of .
期刊介绍:
Topology and its Applications is primarily concerned with publishing original research papers of moderate length. However, a limited number of carefully selected survey or expository papers are also included. The mathematical focus of the journal is that suggested by the title: Research in Topology. It is felt that it is inadvisable to attempt a definitive description of topology as understood for this journal. Certainly the subject includes the algebraic, general, geometric, and set-theoretic facets of topology as well as areas of interactions between topology and other mathematical disciplines, e.g. topological algebra, topological dynamics, functional analysis, category theory. Since the roles of various aspects of topology continue to change, the non-specific delineation of topics serves to reflect the current state of research in topology.
At regular intervals, the journal publishes a section entitled Open Problems in Topology, edited by J. van Mill and G.M. Reed. This is a status report on the 1100 problems listed in the book of the same name published by North-Holland in 1990, edited by van Mill and Reed.