Armengol Gasull

Degenerate Hopf Bifurcations in Discontinuous Planar Systems

B. Coll, Armengol Gasull, R. Prohens · Journal of Mathematical Analysis and Applications · 2001 · 150 citations

Discrete Dynamical System, Degenerate Hopf Bifurcations, Geometric Singular Perturbation Theory +2

Limit Cycles for a Class of Abel Equations

Armengol Gasull, Jaume Libre · SIAM Journal on Mathematical Analysis · 1990 · 131 citations

Limit Cycles, Homogeneous Nonlinearities, Abel Differential Equation +4

A Polynomial Counterexample to the Markus–Yamabe Conjecture

Anna Cima, Arno van den Essen, Armengol Gasull et al. · Advances in Mathematics · 1997 · 106 citations

Polynomial Counterexample, Algebraic Combinatorics

Center-Focus Problem for Discontinuous Planar Differential Equations

Armengol Gasull, Joan Torregrosa · International Journal of Bifurcation and Chaos · 2003 · 90 citations

Numerical Analysis, Limit Cycles, Weak Focus +6

An Explicit Expression of the First Liapunov and Period Constants with Applications

Armengol Gasull, Antoni Guillamon, Vı́ctor Mañosa · Journal of Mathematical Analysis and Applications · 1997 · 82 citations · Full text

Deterministic Dynamical System, Explicit Expression, Period Constants +6