20th anniversary of the IRL Jean-Christophe Yoccoz in Rio and birth of the MATHAM federation
From January 26 to 28, 2026, IMPA and the CNRS celebrated the 20th anniversary of the Jean-Christophe Yoccoz IRL in Rio de Janeiro. This anniversary also marked the launch of the FRA MATH-AMERICAS (MATHAM) federation, which brings together and unites the six CNRS mathematics IRLs in the Americas.