2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/127214We study the fundamental properties of curvature in groupoids within the framework of synthetic differential geometry. As is usual in synthetic differential geometry, its combinatorial nature is emphasized. In particular, the classical Bianchi identity is deduced from its combinatorial one.1 figureDifferential Geometry58A03text