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Journal of Fixed Point Theory and Applications最新文献

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Geodesics of norms on the contactomorphisms group of $${mathbb {R}}^{2n}times S^1$$ 的接触同构群上的模的测地线 $${mathbb {R}}^{2n}times S^1$$
3区 数学
Journal of Fixed Point Theory and Applications Pub Date : 2023-09-16 DOI: 10.1007/s11784-023-01082-8
Pierre-Alexandre Arlove
{"title":"Geodesics of norms on the contactomorphisms group of $${mathbb {R}}^{2n}times S^1$$","authors":"Pierre-Alexandre Arlove","doi":"10.1007/s11784-023-01082-8","DOIUrl":"https://doi.org/10.1007/s11784-023-01082-8","url":null,"abstract":"Abstract We prove that some paths of contactomorphisms of $${mathbb {R}}^{2n}times S^1$$ <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"> <mml:mrow> <mml:msup> <mml:mrow> <mml:mi>R</mml:mi> </mml:mrow> <mml:mrow> <mml:mn>2</mml:mn> <mml:mi>n</mml:mi> </mml:mrow> </mml:msup> <mml:mo>×</mml:mo> <mml:msup> <mml:mi>S</mml:mi> <mml:mn>1</mml:mn> </mml:msup> </mml:mrow> </mml:math> endowed with its standard contact structure are geodesics for different norms defined on the identity component of the group of compactly supported contactomorphisms and its universal cover. We characterize these geodesics by giving conditions on the Hamiltonian functions that generate them. For every norm considered we show that the norm of a contactomorphism that is the time-one of such a geodesic can be expressed in terms of the maximum of the absolute value of the corresponding Hamiltonian function. In particular we recover the fact that these norms are unbounded.","PeriodicalId":54835,"journal":{"name":"Journal of Fixed Point Theory and Applications","volume":"141 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135307281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Concepts of almost periodicity and ergodic theorems in locally convex spaces 局部凸空间中概周期性和遍历定理的概念
IF 1.8 3区 数学
Journal of Fixed Point Theory and Applications Pub Date : 2023-08-16 DOI: 10.1007/s11784-023-01081-9
Fardin Amini, S. Saeidi
{"title":"Concepts of almost periodicity and ergodic theorems in locally convex spaces","authors":"Fardin Amini, S. Saeidi","doi":"10.1007/s11784-023-01081-9","DOIUrl":"https://doi.org/10.1007/s11784-023-01081-9","url":null,"abstract":"","PeriodicalId":54835,"journal":{"name":"Journal of Fixed Point Theory and Applications","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42883584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Normalized solutions to nonlocal Schrödinger systems with L2documentclass[12pt]{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} begin{document}$$L^2$$end{ L2documentclass[12pt]{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amssyb} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} begin{document}$$L^2$$end{
IF 1.8 3区 数学
Journal of Fixed Point Theory and Applications Pub Date : 2023-08-14 DOI: 10.1007/s11784-023-01077-5
Jiaqing Hu, Anmin Mao
{"title":"Normalized solutions to nonlocal Schrödinger systems with L2documentclass[12pt]{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} begin{document}$$L^2$$end{","authors":"Jiaqing Hu, Anmin Mao","doi":"10.1007/s11784-023-01077-5","DOIUrl":"https://doi.org/10.1007/s11784-023-01077-5","url":null,"abstract":"","PeriodicalId":54835,"journal":{"name":"Journal of Fixed Point Theory and Applications","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46531166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Sufficient conditions for perturbations to define the resolvent of the equilibrium problem on complete geodesic spaces 定义完全测地线空间上平衡问题解的摄动的充分条件
IF 1.8 3区 数学
Journal of Fixed Point Theory and Applications Pub Date : 2023-08-05 DOI: 10.1007/s11784-023-01071-x
Y. Kimura, K. Sasaki
{"title":"Sufficient conditions for perturbations to define the resolvent of the equilibrium problem on complete geodesic spaces","authors":"Y. Kimura, K. Sasaki","doi":"10.1007/s11784-023-01071-x","DOIUrl":"https://doi.org/10.1007/s11784-023-01071-x","url":null,"abstract":"","PeriodicalId":54835,"journal":{"name":"Journal of Fixed Point Theory and Applications","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45909854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Application of Tikhonov fixed point theorem to analyze an inverse problem for a bioconvective flow model 应用Tikhonov不动点定理分析生物对流模型的反问题
IF 1.8 3区 数学
Journal of Fixed Point Theory and Applications Pub Date : 2023-08-04 DOI: 10.1007/s11784-023-01079-3
A. Coronel, Alexis Tello, Fernando Huancas, M. Rojas-Medar
{"title":"Application of Tikhonov fixed point theorem to analyze an inverse problem for a bioconvective flow model","authors":"A. Coronel, Alexis Tello, Fernando Huancas, M. Rojas-Medar","doi":"10.1007/s11784-023-01079-3","DOIUrl":"https://doi.org/10.1007/s11784-023-01079-3","url":null,"abstract":"","PeriodicalId":54835,"journal":{"name":"Journal of Fixed Point Theory and Applications","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43383785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Variational formulae of some functionals by the modified Schouten tensor 一些泛函的修正Schouten张量变分公式
IF 1.8 3区 数学
Journal of Fixed Point Theory and Applications Pub Date : 2023-08-01 DOI: 10.1007/s11784-023-01075-7
G. Huang, B. Ma, Qianyu Zeng
{"title":"Variational formulae of some functionals by the modified Schouten tensor","authors":"G. Huang, B. Ma, Qianyu Zeng","doi":"10.1007/s11784-023-01075-7","DOIUrl":"https://doi.org/10.1007/s11784-023-01075-7","url":null,"abstract":"","PeriodicalId":54835,"journal":{"name":"Journal of Fixed Point Theory and Applications","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47563668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fixed point theorem for mappings contracting perimeters of triangles 映射收缩三角形周长的不动点定理
IF 1.8 3区 数学
Journal of Fixed Point Theory and Applications Pub Date : 2023-08-01 DOI: 10.1007/s11784-023-01078-4
E. Petrov
{"title":"Fixed point theorem for mappings contracting perimeters of triangles","authors":"E. Petrov","doi":"10.1007/s11784-023-01078-4","DOIUrl":"https://doi.org/10.1007/s11784-023-01078-4","url":null,"abstract":"","PeriodicalId":54835,"journal":{"name":"Journal of Fixed Point Theory and Applications","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44546587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Existence of positive solutions for one dimensional Minkowski curvature problem with singularity 具有奇异性的一维Minkowski曲率问题正解的存在性
IF 1.8 3区 数学
Journal of Fixed Point Theory and Applications Pub Date : 2023-07-24 DOI: 10.1007/s11784-023-01076-6
Tingzhi Cheng, Xianghui Xu
{"title":"Existence of positive solutions for one dimensional Minkowski curvature problem with singularity","authors":"Tingzhi Cheng, Xianghui Xu","doi":"10.1007/s11784-023-01076-6","DOIUrl":"https://doi.org/10.1007/s11784-023-01076-6","url":null,"abstract":"","PeriodicalId":54835,"journal":{"name":"Journal of Fixed Point Theory and Applications","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46335092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An infinite dimensional version of the intermediate value theorem 中间值定理的无限维版本
IF 1.8 3区 数学
Journal of Fixed Point Theory and Applications Pub Date : 2023-07-12 DOI: 10.1007/s11784-023-01073-9
Pierluigi Benevieri, A. Calamai, Massimo Furi, M. Pera
{"title":"An infinite dimensional version of the intermediate value theorem","authors":"Pierluigi Benevieri, A. Calamai, Massimo Furi, M. Pera","doi":"10.1007/s11784-023-01073-9","DOIUrl":"https://doi.org/10.1007/s11784-023-01073-9","url":null,"abstract":"","PeriodicalId":54835,"journal":{"name":"Journal of Fixed Point Theory and Applications","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47827591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A generalization of the Goebel–Kirk fixed point theorem for asymptotically nonexpansive mappings 渐近非扩张映射的Goebel–Kirk不动点定理的推广
IF 1.8 3区 数学
Journal of Fixed Point Theory and Applications Pub Date : 2023-07-06 DOI: 10.1007/s11784-023-01072-w
J. Matkowski
{"title":"A generalization of the Goebel–Kirk fixed point theorem for asymptotically nonexpansive mappings","authors":"J. Matkowski","doi":"10.1007/s11784-023-01072-w","DOIUrl":"https://doi.org/10.1007/s11784-023-01072-w","url":null,"abstract":"","PeriodicalId":54835,"journal":{"name":"Journal of Fixed Point Theory and Applications","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46619178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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