Reminiscences of a Mathematical Sojourn at San Marcos, 1959 - 61, and at IMPA, 1962.
This evocative essay recounts aspects of the initiation of the author into Mathematics at the University of San Marcos, Lima, Peru, 1959-61, and at the National
Institute of Pure and Applied Mathematics, IMPA, Rio de Janeiro, Brazil, 1962. It links four previous mathematical essays: My Geometry Notebook : DOI:
10.13140/RG.2.2.18090.47043, Mathematical Encounters , On a list of Ordinary Differential Equations Problems, : http://arxiv.org/abs/1808.10571,
and On Mauricio M. Peixoto and the arrival of Structural Stability to Rio de Janeiro, 1955.  : https://doi.org/10.1590/0001-3765202020191219 .