Published articles

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13 p, 370.0 KB Existence of at most two limit cycles for some non-autonomous differential equations / Gasull, Armengol (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Zhao, Yulin (Sun Yat-sen University. School of Mathematics)
It is know that the non-autonomous differential equations dx/dt = a(t) + b(t)|x|, where a(t) and b(t) are 1-periodic maps of class C1, have no upper bound for their number of limit cycles (isolated solutions satisfying x(0) = x(1)). [...]
2023 - 10.3934/cpaa.2023016
Communications on Pure and Applied Analysis, Vol. 22, Issue 3 (March 2023) , p. 970-982  

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