J. Itikawa, J. Llibre.
New classes of polynomial maps satisfying the real Jacobian conjecture in $ R^2$.
An. Acad. Brasil. Ci., 91(2), e20170627. 2019. [DOI]
PreprintAbstractPreprint at DDDUAB

A. Korobeinikov, M. Caubergh, J. T. Lázaro, J. Sardanyés.
Extended Abstracts Spring 2018 (Singularly perturbed systems, multiscale phenomena and hysteresis: theory and applications).
Birhäuser, 2019.
Link at publisherAbstract

S. Li, J. Llibre.
Phase portraits of continuous piecewise linear Liénard differential systems with three zones.
Chaos Solitons Fractals, 120, 149-157. 2019. [DOI]
PreprintAbstractPreprint at DDDUAB

S. Li, J. Llibre.
Phase portraits of piecewise linear continuous differential systems with two zones separated by a straight line.
J. Differential Equations, 266, 8094-8109. 2019. [DOI]
PreprintAbstractPreprint at DDDUAB

S. Li, J. Llibre.
On the limit cycles of planar discontinuous piecewise linear differential systems with a unique equilibrium.
Discrete Contin. Dyn. Syst. Ser. B, 24(11), 5885-5901. 2019. [DOI]
PreprintAbstractPreprint at DDDUAB

S. Li, J. Llibre.
Global phase portraits of the key pitchfork bifurcation.
Scientia Sinica Mathematica, 49(9), 1201-1208. 2019. [DOI]
PreprintAbstract

J. Llibre.
Limit cycles in continuous and discontinuous piecewise linear differential systems with two pieces separated by a straight line.
Bul. Acad. Ştiinţe Repub. Mold. Mat., 2, 3-12. 2019.
PreprintAbstractPreprint at DDDUAB

J. Llibre, A. Makhlouf.
Zero-Hopf periodic orbit of a quadratic system of differential equations obtained from a third-order differential equation.
Differ. Equ. Dyn. Syst., 27, 75-82. 2019. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, Y. P. Martinez-Mancilla, C. Vidal.
Phase portraits of linear type centers of polynomial Hamiltonian systems with Hamiltonian function of degree 5 of the form H=H_1(x)+H_2(y).
Discrete Contin. Dyn. Syst., 39(1), 75-133. 2019. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, M. Mousavi, A. Nabavi.
New family of centers of planar polynomial differential systems of arbitrary even degree.
J. Dyn. Control Syst., 25, 619-630. 2019. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, R. D. S. Oliveira, C. Valls.
Final evolutions for simplified multistrain/two-stream model for tuberculosis and dengue fever.
Chaos Solitons Fractals, 118, 181-186. 2019. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, E. Ponce, C. Valls.
Two limit cycles in Liénard piecewise linear differential systems.
J. Nonlinear Sci., 29, 1499-1522. 2019. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, R. O. Ramírez, V. Ramírez.
An inverse approach to the center problem.
Rend. Circ. Mat. Palermo (2), 68, 29-64. 2019. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, R. O. Ramírez, V. Ramírez.
Center problem for $\lambda$-$\Omega$ differential systems.
J. Differential Equations, 267, 6409-6446. 2019. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, T. Salhi.
The limit cycles of a class of quintic polynomial vector fields.
Topol. Methods Nonlinear Anal., 54(2), 141-151. 2019. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, T. Salhi.
On the limit cycles surrounding a diagonalizable linear node with homogeneous nonlinearities.
Appl. Math. Lett., 98, 427-431. 2019. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, V. F. Sirvent.
On topological entropy, Lefschetz numbers and Lefschetz zeta functions.
Topology Appl., 268(106906), 1-14. 2019. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, Y. Tang.
Limit cycles of discontinuous piecewise quadratic and cubic polynomial perturbations of a linear center.
Discrete Contin. Dyn. Syst. Ser. B, 24(4), 1769-1784. 2019. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, C. Valls.
Integrability of reversible and equivariant quadratic polynomial differential systems in the plane.
Rocky Mountain J. Math., 49(2), 579-591. 2019. [DOI]
PreprintAbstractPreprint at DDDUAB

J. Llibre, C. Valls.
Periodic orbits of the planar anisotropic generalized Kepler problem.
J. Math. Phys., 60, 042901. 2019. [DOI]
PreprintAbstractPreprint at DDDUAB