Limit cycles created by piecewise linear centers
Llibre, Jaume (Universitat Autònoma de Barcelona. Departament de Matemàtiques)
Zhang, Xiang (Shanghai Jiao Tong University. School of Mathematical Sciences)

Data:	2019
Resum:	In the last few years, the interest for studying the piecewise linear differential systems has increased strongly, mainly due to their applications to many physical phenomena. In the study of these differential systems, the limit cycles play a main role. Up to now, the major part of papers which study the limit cycles of the piecewise linear differential systems consider only two pieces. Here, we consider piecewise linear differential systems with three pieces. In this paper, we study the limit cycles of the discontinuous piecewise linear differential systems in the plane R 2 formed by three arbitrary linear centers separated by the set Σ = {(x, y) ∈ R 2: y = 0 {or} x = 0 {and} y ≥ 0 }. We prove that such discontinuous piecewise linear differential systems can have 1, 2, or 3 limit cycles, with 3 the maximum number of limit cycles that such systems can have. Moreover, the limit cycles are nested and must intersect Σ in three or four points. The limit cycles having three intersection points with Σ can reach the maximum number 3. The limit cycles having four intersection points with Σ are at most 1, and if it exists, the systems could simultaneously have 1 or 2 limit cycles intersecting Σ in three points.
Ajuts:	Ministerio de Economía y Competitividad MTM2016-77278-P Ministerio de Economía y Competitividad MDM-2014-0445 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1617 European Commission 777911
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Limit cycles ; Linear centers ; Discontinuous piecewise differential systems ; First integrals
Publicat a:	Chaos, Vol. 29, Issue 5 (May 2019) , art. 053116, ISSN 1089-7682

DOI: 10.1063/1.5086018
PMID: 31154799

Postprint 21 p, 336.3 KB

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