Notices of the International Consortium of Chinese Mathematicians

Volume 6 (2018)

Number 2

Mathematical encounters

Pages: 94 – 98



Jorge Sotomayor (Instituto de Matemática e Estatística, Universidade de São Paulo, S.P, Brazil)


This evocative essay focuses on mathematical activities witnessed by the author from 1962 through 1964 at the IMPA. The list of research problems proposed in September 1962 by Mauricio Peixoto at the “Seminar on the Qualitative Theory of Differential Equations” is pointed out as a landmark for the beginning of the systematic research in the Qualitative Theory of Differential Equations and Dynamical Systems in Brazil.


structural stability, bifurcation, qualitative theory, differential equation, dynamical system

2010 Mathematics Subject Classification

01A60, 01A67, 37C20

Dedicated to the memory of Mauricio M. Peixoto (April 15, 1921 – April 28, 2019)

The author is grateful to L. F. Mello and R. A. Garcia for helpful comments.

The author has the partial support of CNPq, PQ-SR-307690/2016-4.

Published 16 May 2019