{"title":"方向反转同胚迭代的不动点指标","authors":"Grzegorz Graff , Patryk Topór","doi":"10.1016/j.jde.2025.113322","DOIUrl":null,"url":null,"abstract":"<div><div>We show that any sequence of integers satisfying necessary Dold's congruences is realized as the sequence of fixed point indices of the iterates of an orientation-reversing homeomorphism of <span><math><msup><mrow><mi>R</mi></mrow><mrow><mi>m</mi></mrow></msup></math></span> for <span><math><mi>m</mi><mo>≥</mo><mn>3</mn></math></span>. As an element of the construction of the above homeomorphism, we consider the class of boundary-preserving homeomorphisms of <span><math><msubsup><mrow><mi>R</mi></mrow><mrow><mo>+</mo></mrow><mrow><mi>m</mi></mrow></msubsup></math></span> and give the answer to the problem posed by Barge and Wójcik (2017) <span><span>[2]</span></span> providing a complete description of the forms of fixed point indices for this class of maps.</div></div>","PeriodicalId":15623,"journal":{"name":"Journal of Differential Equations","volume":"436 ","pages":"Article 113322"},"PeriodicalIF":2.4000,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Fixed point indices of iterates of orientation-reversing homeomorphisms\",\"authors\":\"Grzegorz Graff , Patryk Topór\",\"doi\":\"10.1016/j.jde.2025.113322\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>We show that any sequence of integers satisfying necessary Dold's congruences is realized as the sequence of fixed point indices of the iterates of an orientation-reversing homeomorphism of <span><math><msup><mrow><mi>R</mi></mrow><mrow><mi>m</mi></mrow></msup></math></span> for <span><math><mi>m</mi><mo>≥</mo><mn>3</mn></math></span>. As an element of the construction of the above homeomorphism, we consider the class of boundary-preserving homeomorphisms of <span><math><msubsup><mrow><mi>R</mi></mrow><mrow><mo>+</mo></mrow><mrow><mi>m</mi></mrow></msubsup></math></span> and give the answer to the problem posed by Barge and Wójcik (2017) <span><span>[2]</span></span> providing a complete description of the forms of fixed point indices for this class of maps.</div></div>\",\"PeriodicalId\":15623,\"journal\":{\"name\":\"Journal of Differential Equations\",\"volume\":\"436 \",\"pages\":\"Article 113322\"},\"PeriodicalIF\":2.4000,\"publicationDate\":\"2025-04-18\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Differential Equations\",\"FirstCategoryId\":\"100\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0022039625003493\",\"RegionNum\":2,\"RegionCategory\":\"数学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATHEMATICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Differential Equations","FirstCategoryId":"100","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0022039625003493","RegionNum":2,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATHEMATICS","Score":null,"Total":0}
Fixed point indices of iterates of orientation-reversing homeomorphisms
We show that any sequence of integers satisfying necessary Dold's congruences is realized as the sequence of fixed point indices of the iterates of an orientation-reversing homeomorphism of for . As an element of the construction of the above homeomorphism, we consider the class of boundary-preserving homeomorphisms of and give the answer to the problem posed by Barge and Wójcik (2017) [2] providing a complete description of the forms of fixed point indices for this class of maps.
期刊介绍:
The Journal of Differential Equations is concerned with the theory and the application of differential equations. The articles published are addressed not only to mathematicians but also to those engineers, physicists, and other scientists for whom differential equations are valuable research tools.
Research Areas Include:
• Mathematical control theory
• Ordinary differential equations
• Partial differential equations
• Stochastic differential equations
• Topological dynamics
• Related topics