Resultats globals: 2 registres trobats en 0.01 segons.
Articles, 2 registres trobats
Articles 2 registres trobats  
1.
Critical periods in planar polynomial centers near a maximum number of cusps / De Maesschalck, Peter (Hasselt University) ; Torregrosa, Joan (Universitat Autònoma de Barcelona. Departament de Matemàtiques)
We provide the best lower bound for the number of critical periods of planar polynomial centers known up to now. The new lower bound is obtained in the Hamiltonian class and considering a single period annulus. [...]
2024 - 10.1016/j.jde.2023.10.034
Journal of differential equations, Vol. 380 (January 2024) , p. 181-197  
2.
34 p, 509.4 KB Cyclicity of a fake saddle inside the quadratic vector fields / de Maesschalck, Peter (Hasselt University (Belgium)) ; Torregrosa, Joan (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Rebollo-Perdomo, Salomón (Universitat Autònoma de Barcelona. Centre de Recerca per a l'Educació Científica i Matemàtica)
This paper concerns the study of small-amplitude limit cycles that appear in the phase portrait near an unfolded fake saddle singularity. This degenerate singularity is also known as a impassable grain. [...]
2015 - 10.1016/j.jde.2014.09.024
Journal of differential equations, Vol. 258 Núm. 2 (2015) , p. 588-620  

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