1. Selected publications

2. References

He earned his Ph.D. from the IMPA in 1964 under the supervision of Maurício Peixoto.^[1][2][3]

He is a recipient of Brazil's National Order of Scientific Merit in mathematics.^[4] Since 1994 he has been a member of the Brazilian Academy of Sciences.^[1]

He is the author of the textbooks {{lang|pt|Lições de Equações Diferenciais Ordinárias}} and {{lang|pt|Curvas Definidas por Equações Diferenciais no Plano}}. He has also translated essays of Henri Poincaré into the Portuguese, which were published on a book under the title {{lang|pt|Um Poeta, um Matemático e um Físico: Três Ensaios Biográficos por Henri Poincaré}}.

Selected publications

• "Generic one-parameter families of vector fields on two-dimensional manifolds", Publications Mathématiques de l'IHÉS.
• with F. Dumortier and R. Roussarie: "Generic 3-parameter families of vector fields on the plane, unfolding a singularity with nilpotent linear part. The cusp case of codimension 3", Ergodic Theory and Dynamical Systems.
• "with C. Gutiérrez: Structurally Stable Configurations of Lines of Principal Curvature", Astérisque.

References

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• 5,3,3
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