J. Llibre, T. Salhi.
On the limit cycles of the piecewise differential systems formed by a linear focus or center and quadratic weak focus or center.
Chaos Solitons Fractals, 160, 112256. 2022. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, M. A. Teixeira.
Limit cycles in Filippov systems having a circle as switching manifold.
Chaos, 32, 053106. 2022. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, Y. Tian.
Meromorphic integrability of the Hamiltonian systems with homogeneous potentials of degree -4.
Discrete Contin. Dyn. Syst. Ser. B, 27(8), 4305-4316. 2022. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, C. Valls.
Phase portraits of uniform isochronous centers with homogeneous nonlinearities.
J. Dyn. Control Syst., 28, 319-332. 2022. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, C. Valls.
Global dynamics for the Szekeres system with non-zero cosmological constant.
Phys. Dark. Universe, 35, 100954:1-4. 2022. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, C. Valls.
Twin polynomial vector fields of arbitrary degree.
Bull. Braz. Math. Soc. (N.S.), 53, 295-306. 2022. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, C. Valls.
Crossing limit cycles for discontinuous piecewise differential systems formed by linear Hamiltonian saddles or linear centers separated by a conic.
Chaos Solitons Fractals, 159, 112076:1-8. 2022. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, C. Valls.
Phase portraits of the Leslie-Grower system.
Acta Math. Sin. (Engl. Ser.), 42B(5), 1734-1742. 2022. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, C. Valls.
Global centers of the generalized polynomial Liénard differential systems.
J. Differential Equations, 330, 66-80. 2022. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, C. Valls.
Non-existence and uniqueness of limit cycles in a class of generalized Liénard equations.
Bol. Soc. Mat. Mexicana, 28, 41:1-12. 2022. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, C. Valls.
The improved Euler-Jacobi formula and the planar cubic polynomial vector fields in $R^2$.
Dyn. Syst., 37(3), 403-443. 2022. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, C. Valls.
Limit cycles of piecewise differential systems with linear Hamiltonian saddles and linear centres.
Dyn. Syst., 37(2), 262-279. 2022. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, C. Valls.
The improved euler-Jacobi formula and the planar polynomial vector fields of degree 2-4.
Bull. Belg. Math. Soc. Simon Stevin, 29(1), 63-85. 2022. [DOI]
PreprintAbstract

D. Marín, J. Villadelprat.
The criticality of reversible quadratic centers at the outer boundary of its period annulus.
J. Differential Equations, 332, 123-201. 2022. [DOI]
PreprintAbstractPreprint at DDDUAB

D. Marín, J. Villadelprat.
On the cyclicity of Kolmogorov polycycles.
Electron. J. Qual. Theory Differ. Equ., 2022(35), 1-31. 2022. [DOI]
PreprintAbstractPreprint at DDDUAB

D. D. Novaes, G. Rondon.
On limit cycles in regularized Filippov systems bifurcating from homoclinic-like connections to regular-tangential singularities.
Phys. D, 442, Paper No. 133526, 15. 2022. [DOI]
PreprintAbstract

R. D. S. Oliveira, I. Sánchez Sánchez, J. Torregrosa.
Simultaneous bifurcation of limit cycles and critical periods.
Qual. Theory Dyn. Syst., 21(20), 1-35. 2022. [DOI]
PreprintAbstractPreprint at DDDUAB

A. L. Rodero.
Structural stability, centers and limit cycles for smooth and nonsmooth tridimensional vector fields with invariant bidimensional spheres.
PhD thesis, Universidade Estadual Paulista, Sao Jose do Rio Preto (Brazil), February, 2022. (In Portuguese)

D. Rojas.
Oscil·ladors en ressonància.
Butl. Soc. Catalana Mat., 37(2), 137-172. 2022. [DOI] (In Catalan)
PreprintAbstractPreprint at DDDUAB

D. Rojas, P. J. Torres.
Periodic bouncing solutions of the Lazer-Solimini equation with weak repulsive singularity.
Nonlinear Anal. Real World Appl., 64, 103441:1-13. 2022. [DOI]
PreprintAbstractPreprint at DDDUAB