Resultats globals: 2 registres trobats en 0.02 segons.
Articles, 2 registres trobats
Articles 2 registres trobats  
1.
17 p, 468.6 KB Bifurcation of limit cycles in piecewise quadratic differential systems with an invariant straight line / Da Cruz, Leonardo Pereira Costa (Departamento de Matemática. Universidade Federal de São Carlos) ; Torregrosa, Joan (Universitat Autònoma de Barcelona. Departament de Matemàtiques)
We solve the center-focus problem in a class of piecewise quadratic polynomial differential systems with an invariant straight line. The separation curve is also a straight line which is not invariant. [...]
2022 - 10.1016/j.jmaa.2022.126256
Journal of mathematical analysis and applications, Vol. 514, Issue 1 (October 2022) , art. 126256  
2.
12 p, 332.3 KB Weak-foci of high order and cyclicity / Liang, Haihua (Guangdong Polytechnic Normal University(China). Department of Computer Science) ; Torregrosa, Joan (Universitat Autònoma de Barcelona. Departament de Matemàtiques)
A particular version of the 16th Hilbert's problem is to estimate the number, M(n), of limit cycles bifurcating from a singularity of center-focus type. This paper is devoted to finding lower bounds for M(n) for some concrete n by studying the cyclicity of different weak-foci. [...]
2016 - 10.1007/s12346-016-0189-9
Qualitative theory of dynamical systems, 2016  

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