2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/172532This paper is a brief overview of the main contributions of Masaki Kashiwara in the domain of microlocal and algebraic analysis.9 pages, 4 figures. Talk given in honor of Masaki Kashiwara's 60th birthday, Kyoto, June 27, 2007. To appear in Advances in Pure Mathematics (2009)History and OverviewAlgebraic Geometrytext