About me

I was born in Guariba, São Paulo, Brazil. I obtained my PhD from IMPA in 1980 under the supervision of Welington de Melo and have been a faculty member at the Federal University of Rio de Janeiro (UFRJ) since then.

My research focuses on Dynamical Systems, especially on flows with singularities, partial hyperbolicity, and entropy. I have made important contributions to singular hyperbolicity, Lorenz-type attractors, and chaotic dynamics, including seminal works published in Topology, Annals of Mathematics, and Publications Mathématiques de l’IHÉS.

In recent years, in collaboration with Fan Yang, Jiagang Yang, and J. C. Mongez, I have developed entropy methods for singular star flows and partially hyperbolic systems, establishing the existence, uniqueness, and robustness of equilibrium states and maximum entropy measures in several important settings.

My work combines geometric, topological, and ergodic methods to understand complex dynamics beyond uniform hyperbolicity. I have supervised several Master’s and PhD students and have been actively involved in organizing scientific meetings and fostering international collaborations. I regularly serve on doctoral committees and contribute to the development of Dynamical Systems in Brazil and abroad.