In 1976 Lezama received a scholarship to study in the Saint Petersburg State University as part of an agreement between the governments of Colombia and the USSR.

That same year he also visited the University of Buenos Aires and the Instituto Argentino de Matemática under the financial support of CONICET and the second mentioned institute.

[1] Since his return to Colombia, Lezama has had a very active participation in the mathematical community, taking part in national and international events as attendant, speaker and organizer.

[1][6] With time his interest in noncommutative algebra grew until the mentioned seminar changed its name to SAC2 (″Seminario de Álgebra Constructiva″, in Spanish) and the research in such matter started.

[2][3] In 2018 he received public attention when he published in several media an opinion article about the candidature of Sergio Fajardo to the presidency of Colombia.