The Brazilian Mathematical Olympiad, OBM-Olimpíada Brasileira de Matemática, was created in 1979, and it is, nowadays, a partnership of SBM and IMPA. The OBM’s website is located at http://www.obm.org.br.
The OBM organizes the national mathematical olympiads, as well as several regional or state olympiads. Besides, the OBM represents Brazil in international competitions such as IMO – International Mathematical Olympiad and the Iberoamerican Mathematical Olympiad, among others.
Recently, in 2005, the Federal Government created the Brazilian Mathematical Olympiad of Public Schools, OBMEP-Olimpíada Brasileira de Matemática das Escolas Públicas, which is executed by IMPA with collaboration of the SBM and reaches a wide range of students and public schools teachers all over the country. The OBMEP’s website is located at http://www.obmep.org.br.