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Regular and Chaotic Dynamics最新文献

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Numerical and Theoretical Studies on the Rational Standard Map at Moderate-to-Large Values of the Amplitude Parameter 幅值参数中大值的有理标准图的数值与理论研究
IF 1.4 4区 数学
Regular and Chaotic Dynamics Pub Date : 2023-06-02 DOI: 10.1134/S1560354723030024
Pablo M. Cincotta, Claudia M. Giordano, Carles Simó
{"title":"Numerical and Theoretical Studies on the Rational Standard Map at Moderate-to-Large Values of the Amplitude Parameter","authors":"Pablo M. Cincotta,&nbsp;Claudia M. Giordano,&nbsp;Carles Simó","doi":"10.1134/S1560354723030024","DOIUrl":"10.1134/S1560354723030024","url":null,"abstract":"<div><p>In this work an exhaustive numerical and analytical investigation of the dynamics of a bi-parametric symplectic\u0000map, the so-called rational\u0000standard map, at moderate-to-large values of the\u0000amplitude parameter is addressed. After reviewing the model, a discussion concerning an analytical\u0000determination of the maximum Lyapunov exponent is provided together with thorough numerical experiments.\u0000The theoretical results are obtained in the limit of a nearly uniform distribution of the phase values.\u0000Correlations among phases lead to departures from the expected estimates.\u0000In this direction, a detailed study of the role of stable periodic islands of periods 1, 2 and 4 is included.\u0000Finally, an experimental relationship between the Lyapunov and instability times is shown,\u0000while an analytical one applies when correlations are irrelevant, which is the case, in general,\u0000for large values of the amplitude parameter.</p></div>","PeriodicalId":752,"journal":{"name":"Regular and Chaotic Dynamics","volume":"28 3","pages":"265 - 294"},"PeriodicalIF":1.4,"publicationDate":"2023-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4091360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Parametric Resonance of a Charged Pendulum with a Suspension Point Oscillating Between Two Vertical Charged Lines 悬点在两条垂直带电线之间振荡的带电摆的参数共振
IF 1.4 4区 数学
Regular and Chaotic Dynamics Pub Date : 2023-06-02 DOI: 10.1134/S156035472303005X
Adecarlos C. Carvalho, Gerson C. Araujo
{"title":"Parametric Resonance of a Charged Pendulum with a Suspension Point Oscillating Between Two Vertical Charged Lines","authors":"Adecarlos C. Carvalho,&nbsp;Gerson C. Araujo","doi":"10.1134/S156035472303005X","DOIUrl":"10.1134/S156035472303005X","url":null,"abstract":"<div><p>In this study, we analyze a planar mathematical pendulum with a suspension point that oscillates harmonically in the vertical direction. The bob of the pendulum is electrically charged and is located between two wires with a uniform distribution of electric charges, both equidistant from the suspension point. The dynamics of this phenomenon is investigated. The system has three parameters, and we analyze the parametric stability of the equilibrium points, determining surfaces that separate the regions of stability and instability in the parameter space. In the case where the parameter associated with the charges is equal to zero, we obtain boundary curves that separate the regions of stability and instability for the Mathieu equation.</p></div>","PeriodicalId":752,"journal":{"name":"Regular and Chaotic Dynamics","volume":"28 3","pages":"321 - 331"},"PeriodicalIF":1.4,"publicationDate":"2023-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4090128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Formal Stability, Stability for Most Initial Conditions and Diffusion in Analytic Systems of Differential Equations 形式稳定性，大多数初始条件的稳定性和微分方程解析系统的扩散
IF 1.4 4区 数学
Regular and Chaotic Dynamics Pub Date : 2023-06-02 DOI: 10.1134/S1560354723030012
Valery V. Kozlov
{"title":"Formal Stability, Stability for Most Initial Conditions and Diffusion in Analytic Systems of Differential Equations","authors":"Valery V. Kozlov","doi":"10.1134/S1560354723030012","DOIUrl":"10.1134/S1560354723030012","url":null,"abstract":"<div><p>An example of an analytic system of differential equations in <span>(mathbb{R}^{6})</span> with an equilibrium\u0000formally stable and stable for most initial conditions is presented. By means of a divergent formal transformation this system is reduced to a Hamiltonian system with three degrees of freedom. Almost all its phase space is foliated by three-dimensional invariant tori carrying quasi-periodic trajectories.\u0000These tori do not fill all phase space. Though the “gap” between these tori has zero measure, this set is everywhere dense in <span>(mathbb{R}^{6})</span> and unbounded phase trajectories are dense in this gap. In particular, the formally stable equilibrium is Lyapunov unstable. This behavior of phase trajectories is quite consistent with the diffusion in nearly integrable systems. The proofs are based on the Poincaré – Dulac theorem, the theory of almost periodic functions, and on some facts from the theory of inhomogeneous Diophantine approximations. Some open problems related to the example are presented.</p></div>","PeriodicalId":752,"journal":{"name":"Regular and Chaotic Dynamics","volume":"28 3","pages":"251 - 264"},"PeriodicalIF":1.4,"publicationDate":"2023-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4090144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 Note on the Weighted Yamabe Flow 关于加权Yamabe流的注释
IF 1.4 4区 数学
Regular and Chaotic Dynamics Pub Date : 2023-06-02 DOI: 10.1134/S1560354723030048
Theodore Yu. Popelensky
{"title":"A Note on the Weighted Yamabe Flow","authors":"Theodore Yu. Popelensky","doi":"10.1134/S1560354723030048","DOIUrl":"10.1134/S1560354723030048","url":null,"abstract":"<div><p>For two dimensional surfaces (smooth) Ricci and Yamabe flows are equivalent.\u0000In 2003, Chow and Luo developed the theory of combinatorial Ricci flow for circle packing metrics on closed triangulated surfaces.\u0000In 2004, Luo developed a theory of discrete Yamabe flow for closed triangulated surfaces.\u0000He investigated the formation of singularities and convergence to a metric of constant curvature.</p><p>In this note we develop the theory of a naïve discrete Ricci flow and its modification — the so-called weighted Ricci flow. We prove that this flow has a rich family of first integrals and is equivalent to a certain modification of Luo’s discrete Yamabe flow.\u0000We investigate the types of singularities of solutions for these flows and discuss convergence to a metric of weighted\u0000constant curvature.</p></div>","PeriodicalId":752,"journal":{"name":"Regular and Chaotic Dynamics","volume":"28 3","pages":"309 - 320"},"PeriodicalIF":1.4,"publicationDate":"2023-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4091342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
V-Shaped Action Functional with Delay 具有延迟的V形作用函数
IF 1.4 4区 数学
Regular and Chaotic Dynamics Pub Date : 2023-04-10 DOI: 10.1134/S1560354723510020
Urs Frauenfelder
{"title":"V-Shaped Action Functional with Delay","authors":"Urs Frauenfelder","doi":"10.1134/S1560354723510020","DOIUrl":"10.1134/S1560354723510020","url":null,"abstract":"<div><p>In this note we introduce the V-shaped action functional with delay in a symplectization,\u0000which is an intermediate action functional between the Rabinowitz action functional\u0000and the V-shaped action functional. It lives on the same space as the\u0000V-shaped action functional, but its gradient flow equation is a delay equation\u0000as in the case of the Rabinowitz action functional. We show that there is a smooth interpolation\u0000between the V-shaped action functional and the V-shaped action functional with delay\u0000during which the critical points and its actions are fixed. Moreover, we prove that there\u0000is a bijection between gradient flow lines of the V-shaped action functional with delay\u0000and the ones of the Rabinowitz action functional.</p></div>","PeriodicalId":752,"journal":{"name":"Regular and Chaotic Dynamics","volume":"28 4","pages":"364 - 373"},"PeriodicalIF":1.4,"publicationDate":"2023-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50467130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Twist Maps of the Annulus: An Abstract Point of View 环空的扭曲映射：一个抽象的观点
IF 1.4 4区 数学
Regular and Chaotic Dynamics Pub Date : 2023-04-10 DOI: 10.1134/S1560354723510019
Patrice Le Calvez
{"title":"Twist Maps of the Annulus: An Abstract Point of View","authors":"Patrice Le Calvez","doi":"10.1134/S1560354723510019","DOIUrl":"10.1134/S1560354723510019","url":null,"abstract":"<div><p>We introduce the notion of abstract angle at a couple of points defined by two radial foliations of the closed annulus. We will use for this purpose the digital line topology on the set <span>({mathbb{Z}})</span> of relative integers, also called the Khalimsky topology. We use this notion to give unified proofs of some classical results on area preserving positive twist maps of the annulus by using the Lifting Theorem and the Intermediate Value Theorem. More precisely, we will interpretate Birkhoff theory about annular invariant open sets in this formalism. Then we give a proof of Mather’s theorem stating the existence of crossing orbits in a Birkhoff region of instability. Finally we will give a proof of Poincaré – Birkhoff theorem in a particular case, that includes the case where the map is a composition of positive twist maps.</p></div>","PeriodicalId":752,"journal":{"name":"Regular and Chaotic Dynamics","volume":"28 4","pages":"343 - 363"},"PeriodicalIF":1.4,"publicationDate":"2023-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50467129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Smale Regular and Chaotic A-Homeomorphisms and A-Diffeomorphisms 小正则和混沌a -同胚和a -异胚
IF 1.4 4区 数学
Regular and Chaotic Dynamics Pub Date : 2023-04-07 DOI: 10.1134/S1560354723020016
Vladislav S. Medvedev, Evgeny V. Zhuzhoma
{"title":"Smale Regular and Chaotic A-Homeomorphisms and A-Diffeomorphisms","authors":"Vladislav S. Medvedev,&nbsp;Evgeny V. Zhuzhoma","doi":"10.1134/S1560354723020016","DOIUrl":"10.1134/S1560354723020016","url":null,"abstract":"<div><p>We introduce Smale A-homeomorphisms that include regular, semichaotic, chaotic, and\u0000superchaotic homeomorphisms of a topological <span>(n)</span>-manifold <span>(M^{n})</span>, <span>(ngeqslant 2)</span>. Smale A-homeomorphisms contain axiom A diffeomorphisms (in short, A-diffeomorphisms) provided that <span>(M^{n})</span> admits a smooth structure. Regular A-homeomorphisms contain all Morse – Smale diffeomorphisms, while semichaotic and chaotic A-homeomorphisms contain A-diffeomorphisms with trivial and nontrivial basic sets. Superchaotic A-homeomorphisms contain A-diffeomorphisms whose basic sets are nontrivial. The reason to consider Smale A-homeomorphisms instead of A-diffeomorphisms may be attributed to the fact that it is a good weakening of nonuniform hyperbolicity and pseudo-hyperbolicity, a subject which has already seen an immense number of applications.</p><p>We describe invariant sets that determine completely the dynamics of regular, semichaotic, and chaotic Smale A-homeomorphisms. This allows us to get necessary and sufficient conditions of conjugacy for these Smale A-homeomorphisms (in particular, for all Morse – Smale diffeomorphisms). We apply\u0000these necessary and sufficient conditions for structurally stable surface diffeomorphisms\u0000with an arbitrary number of expanding attractors. We also use these conditions to obtain a\u0000complete classification of Morse – Smale diffeomorphisms on projective-like manifolds.</p></div>","PeriodicalId":752,"journal":{"name":"Regular and Chaotic Dynamics","volume":"28 2","pages":"131 - 147"},"PeriodicalIF":1.4,"publicationDate":"2023-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4281926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Stability Analysis of Resonant Rotation of a Gyrostat in an Elliptic Orbit Under Third-and Fourth-Order Resonances 椭圆轨道陀螺三阶和四阶共振旋转稳定性分析
IF 1.4 4区 数学
Regular and Chaotic Dynamics Pub Date : 2023-04-07 DOI: 10.1134/S156035472302003X
Xue Zhong, Jie Zhao, Kaiping Yu, Minqiang Xu
{"title":"Stability Analysis of Resonant Rotation of a Gyrostat in an Elliptic Orbit Under Third-and Fourth-Order Resonances","authors":"Xue Zhong,&nbsp;Jie Zhao,&nbsp;Kaiping Yu,&nbsp;Minqiang Xu","doi":"10.1134/S156035472302003X","DOIUrl":"10.1134/S156035472302003X","url":null,"abstract":"<div><p>This paper presents the stability of resonant rotation of a symmetric gyrostat under third- and fourth-order resonances, whose center of mass moves in an elliptic orbit in a central Newtonian gravitational field. The resonant rotation is a special planar periodic motion of the gyrostat about its center of mass, i. e., the body performs one rotation in absolute space during two orbital revolutions of its center of mass. The equations of motion of\u0000the gyrostat are derived as a periodic Hamiltonian system with three degrees of freedom and a constructive algorithm based on a symplectic map is used to calculate the coefficients of the normalized Hamiltonian. By analyzing the Floquet multipliers of the linearized equations of perturbed motion, the unstable region of the resonant rotation and the region of stability in the first-order approximation are determined in the dimensionless parameter plane. In addition, the third- and fourth-order resonances are obtained in the linear stability region and further nonlinear stability analysis is performed in the third- and fourth-order resonant cases.</p></div>","PeriodicalId":752,"journal":{"name":"Regular and Chaotic Dynamics","volume":"28 2","pages":"162 - 190"},"PeriodicalIF":1.4,"publicationDate":"2023-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4280155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Analyzing the Motion of a Washer on a Rod 分析一杆上的垫圈运动
IF 1.4 4区 数学
Regular and Chaotic Dynamics Pub Date : 2023-04-07 DOI: 10.1134/S1560354723020065
Hiroshi Takano
{"title":"Analyzing the Motion of a Washer on a Rod","authors":"Hiroshi Takano","doi":"10.1134/S1560354723020065","DOIUrl":"10.1134/S1560354723020065","url":null,"abstract":"<div><p>This paper investigates the dynamics of a toy known as the chatter ring.\u0000Specifically, it examines the mechanism by which the small ring rotates around the large ring,\u0000the mechanism by which\u0000the force from the large ring provides torque to the small ring, and\u0000whether the motion of the small ring is the same as that of a hula hoop.\u0000The dynamics of a chatter ring has been investigated in previous work [13, 14, 15];\u0000however, a detailed analysis has not yet been performed.\u0000Thus, to understand the mechanisms described above,\u0000the equations of motion and constraint conditions\u0000are obtained, and an analysis of the motion is performed.\u0000To simplify the problem, a model consisting of\u0000a straight rod and a washer ring is analyzed under the no-slip condition.\u0000The motion of a washer has two modes: the one point of contact (1PC) mode and\u0000two points of contact (2PC) mode.\u0000The motion of the small ring of the chatter ring is similar\u0000to that of a washer in the 2PC mode,\u0000whereas the motion of a hula hoop is similar to that\u0000of a washer in the 1PC mode.\u0000The analysis indicates that the motion of a washer with two points of contact\u0000is equivalent to free fall motion. However, in practice, the velocity reaches a constant\u0000value through energy dissipation.\u0000The washer rotates around an axis that passes through the two points of contact.\u0000The components of the forces exerted by the rod at the points of contact that are normal to the plane of the washer\u0000provide rotational torque acting at the center of mass.\u0000The components of the forces parallel to the horizontal plane\u0000are centripetal forces, which\u0000induce the circular motion of the center of mass.</p></div>","PeriodicalId":752,"journal":{"name":"Regular and Chaotic Dynamics","volume":"28 2","pages":"227 - 250"},"PeriodicalIF":1.4,"publicationDate":"2023-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4280159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Using Couplings to Suppress Chaos and Produce a Population Stabilisation Strategy 利用耦合抑制混沌并产生种群稳定策略
IF 1.4 4区 数学
Regular and Chaotic Dynamics Pub Date : 2023-04-07 DOI: 10.1134/S1560354723020041
Luís M. Lopes, Clara Grácio, Sara Fernandes, Danièle Fournier-Prunaret
{"title":"Using Couplings to Suppress Chaos and Produce a Population Stabilisation Strategy","authors":"Luís M. Lopes,&nbsp;Clara Grácio,&nbsp;Sara Fernandes,&nbsp;Danièle Fournier-Prunaret","doi":"10.1134/S1560354723020041","DOIUrl":"10.1134/S1560354723020041","url":null,"abstract":"<div><p>The chaotic behaviour of dynamical systems can be suppressed if we couple them in some way. In order to do that, the coupling strengths must assume particular values. We illustrate it for the situation that leads to a fixed point behaviour, using two types of couplings corresponding either to a diffusive interaction or a migrative one. For both of them, we present strategies that easily calculate coupling strengths that suppress the chaotic behaviour. We analyse the particular situation of these couplings that consists in a symmetric one and we propose a strategy that provides the suppression of the chaotic evolution of a population.</p></div>","PeriodicalId":752,"journal":{"name":"Regular and Chaotic Dynamics","volume":"28 2","pages":"191 - 206"},"PeriodicalIF":1.4,"publicationDate":"2023-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4281933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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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