论 $$\varphi $$ -Uniform 域的均匀性指数

IF 0.6 4区 数学 Q3 MATHEMATICS Computational Methods and Function Theory Pub Date : 2024-09-11 DOI:10.1007/s40315-024-00561-4
Yahui Sheng, Fan Wen, Kai Zhan
{"title":"论 $$\\varphi $$ -Uniform 域的均匀性指数","authors":"Yahui Sheng, Fan Wen, Kai Zhan","doi":"10.1007/s40315-024-00561-4","DOIUrl":null,"url":null,"abstract":"<p>Let <span>\\(G\\subsetneq {\\mathbb {R}}^n\\)</span> be a domain, where <span>\\(n\\ge 2\\)</span>. Let <span>\\(k_G\\)</span> and <span>\\(j_G\\)</span> be the quasihyperbolic metric and the distance ratio metric on <i>G</i>, respectively. In the present paper, we prove that the identity map of <span>\\((G,k_G)\\)</span> onto <span>\\((G,j_G)\\)</span> is quasisymmetric if and only if it is bilipschitz. To classify domains of <span>\\({\\mathbb {R}}^n\\)</span> into various types according to the behaviors of their quasihyperbolic metrics, we define a uniformity exponent for every proper subdomain of <span>\\({\\mathbb {R}}^n\\)</span> and prove that this exponent may assume any value in <span>\\(\\{0\\}\\cup [1,\\infty ]\\)</span>. Moreover, we study the properties of domains of uniformity exponent 1 and show by an example that such a domain may be neither quasiconvex nor accessible.</p>","PeriodicalId":49088,"journal":{"name":"Computational Methods and Function Theory","volume":"423 1","pages":""},"PeriodicalIF":0.6000,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"On Uniformity Exponents of $$\\\\varphi $$ -Uniform Domains\",\"authors\":\"Yahui Sheng, Fan Wen, Kai Zhan\",\"doi\":\"10.1007/s40315-024-00561-4\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Let <span>\\\\(G\\\\subsetneq {\\\\mathbb {R}}^n\\\\)</span> be a domain, where <span>\\\\(n\\\\ge 2\\\\)</span>. Let <span>\\\\(k_G\\\\)</span> and <span>\\\\(j_G\\\\)</span> be the quasihyperbolic metric and the distance ratio metric on <i>G</i>, respectively. In the present paper, we prove that the identity map of <span>\\\\((G,k_G)\\\\)</span> onto <span>\\\\((G,j_G)\\\\)</span> is quasisymmetric if and only if it is bilipschitz. To classify domains of <span>\\\\({\\\\mathbb {R}}^n\\\\)</span> into various types according to the behaviors of their quasihyperbolic metrics, we define a uniformity exponent for every proper subdomain of <span>\\\\({\\\\mathbb {R}}^n\\\\)</span> and prove that this exponent may assume any value in <span>\\\\(\\\\{0\\\\}\\\\cup [1,\\\\infty ]\\\\)</span>. Moreover, we study the properties of domains of uniformity exponent 1 and show by an example that such a domain may be neither quasiconvex nor accessible.</p>\",\"PeriodicalId\":49088,\"journal\":{\"name\":\"Computational Methods and Function Theory\",\"volume\":\"423 1\",\"pages\":\"\"},\"PeriodicalIF\":0.6000,\"publicationDate\":\"2024-09-11\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Computational Methods and Function Theory\",\"FirstCategoryId\":\"100\",\"ListUrlMain\":\"https://doi.org/10.1007/s40315-024-00561-4\",\"RegionNum\":4,\"RegionCategory\":\"数学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"MATHEMATICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Computational Methods and Function Theory","FirstCategoryId":"100","ListUrlMain":"https://doi.org/10.1007/s40315-024-00561-4","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

摘要

让(G/subsetneq {\mathbb {R}}^n\) 是一个域,其中(n/ge 2\).让 \(k_G\) 和 \(j_G\) 分别是 G 上的准双曲度量和距离比度量。在本文中,我们将证明当且仅当 \((G,k_G)\ 到 \((G,j_G)\) 的标识映射是双双曲的时候,它是准对称的。为了根据准双曲度量的行为将 \({\mathbb {R}}^n\) 的域划分为各种类型,我们为 \({\mathbb {R}}^n\) 的每个适当子域定义了一个均匀性指数,并证明这个指数可以在 \({0\}\cup [1,\infty ]\) 中取任意值。此外,我们还研究了均匀性指数为 1 的域的性质,并通过一个例子证明了这样的域可能既不是准凸的,也不是可及的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

摘要图片

查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
On Uniformity Exponents of $$\varphi $$ -Uniform Domains

Let \(G\subsetneq {\mathbb {R}}^n\) be a domain, where \(n\ge 2\). Let \(k_G\) and \(j_G\) be the quasihyperbolic metric and the distance ratio metric on G, respectively. In the present paper, we prove that the identity map of \((G,k_G)\) onto \((G,j_G)\) is quasisymmetric if and only if it is bilipschitz. To classify domains of \({\mathbb {R}}^n\) into various types according to the behaviors of their quasihyperbolic metrics, we define a uniformity exponent for every proper subdomain of \({\mathbb {R}}^n\) and prove that this exponent may assume any value in \(\{0\}\cup [1,\infty ]\). Moreover, we study the properties of domains of uniformity exponent 1 and show by an example that such a domain may be neither quasiconvex nor accessible.

求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Computational Methods and Function Theory
Computational Methods and Function Theory MATHEMATICS, APPLIED-MATHEMATICS
CiteScore
3.20
自引率
0.00%
发文量
44
审稿时长
>12 weeks
期刊介绍: CMFT is an international mathematics journal which publishes carefully selected original research papers in complex analysis (in a broad sense), and on applications or computational methods related to complex analysis. Survey articles of high standard and current interest can be considered for publication as well.
期刊最新文献
On Uniformity Exponents of $$\varphi $$ -Uniform Domains Hilbert-Type Operators Acting on Bergman Spaces A Characterization of Concave Mappings Using the Carathéodory Class and Schwarzian Derivative The $$*$$ -Exponential as a Covering Map Entire Solutions of Certain Type Binomial Differential Equations
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1