J. Llibre, M. Messias, A. C. Reinol.
Zero-Hopf bifurcations in three-dimensional chaotic systems with one stable equilibrium.
Internat. J. Bifur. Chaos Appl. Sci. Engrg., 30(12), 2050189. 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, A. Murza, C. Valls.
On a conjecture on the integrability of Liénard systems.
Rend. Circ. Mat. Palermo (2), 69, 209-216. 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, A. Nabavi, M. Mousavi.
Limit cycles bifurcating from a family of reversible quadratic centers via averaging theory.
Internat. J. Bifur. Chaos Appl. Sci. Engrg., 30(4), 2050051:1-8. 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, D. D. Novaes, C. A. B. Rodrigues.
Bifurcations from families of periodic solutions in piecewise differential systems.
Phys. D, 404, 132342:1-12. 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, D. D. Novaes, I. O. Zeli.
Limit cycles of piecewise polynomial perturbations of higher dimensional lineal differential systems.
Rev. Mat. Iberoam., 36(1), . 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, R. D. S. Oliveira, C. A. B. Rodrigues.
Limit cycles for two classes of control piecewise linear differential systems.
Sao Paulo J. Math. Sci., 1-17. 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, C. Pantazi.
Qualitative study of a model with Rastall gravity.
Classical Quantum Gravity, 37(24), 245010:1-25. 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, W. F. Pereira, C. Pessoa.
Phase portraits of Bernoulli quadratic polynomial differential systems.
Electron. J. Differential Equations, 2020(48), 1-19. 2020.
PreprintAbstractPreprint at DDDUAB

J. Llibre, O. Ramírez.
Gradient systems of harmonic polynomials.
J. Differential Equations, 269, 10073-10084. 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, R. O. Ramírez.
Integrability by separation of variables.
Phys. D, 409, 132523:1-22. 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, R. O. Ramírez, V. Ramírez.
Integrability of a class of N-dimensional Lotka-Volterra and Kolmogorov systems.
J. Differential Equations, 269, 2503-2531. 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, R. O. Ramírez, N. Sadovskaia.
Differential equations with a given set of solutions.
Appl. Math. Comput., 365, 124659:1-20. 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, V. F. Sirvent.
Periods of holomorphic maps on compact Riemann surfaces and product of spheres.
J. Difference Equ. Appl., 26(8), 1059-1066. 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, V. F. Sirvent.
Periodic structure of transversal maps on sum-free products of spheres.
J. Difference Equ. Appl., 25(5), 619-629. 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, D. J. Tonon, M. Q. Velter.
Crossing periodic orbits via first integrals.
Internat. J. Bifur. Chaos Appl. Sci. Engrg., 30(11), 2050163 (9 pages). 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, C. Valls.
Global qualitative dynamics of the brusselator system.
Math. Comput. Simulation, 170, 107-114. 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, C. Valls.
Centers of planar generalized Abel equations.
J. Differential Equations, 268, 6481-6487. 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, C. Valls.
On the configurations of the singular points and their topological indices for the spatial quadratic polynomial differential systems.
J. Differential Equations, 269, 10571-10586. 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, C. Valls.
On the singularities of the planar cubic polynomial differential systems and the Euler Jacobi formula.
Qual. Theory Dyn. Syst., 19(96), 1-34. 2020. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, D. Xiao.
On the configurations of centers of planar Hamiltonian Kolmogorov cubic polynomial differential systems.
Pacific J. Math., 306(2), 611-644. 2020. [DOI]
PreprintAbstractPreprint at DDDUAB