2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/58667We investigate deformations of lagrangian manifolds with singularities. We introduce a complex similar to the de Rham-complex whose cohomology calculates deformation spaces. Examples of singular lagrangian varieties are presented and deformations are calculated explicitly.19 PagesAlgebraic GeometrySymplectic Geometry14B05, 14B12, 58F05 (Primary) 32S40, 32S60 (Secondary)text