2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/51189We discuss some issues related to spontaneous N=2-> N=1 supersymmetry breaking. In particular, we state a set of geometrical conditions which are necessary that such a breaking occurs. Furthermore, we discuss the low energy N=1 effective Lagrangian and show that it satisfies non-trivial consistency conditions which can also be viewed as conditions on the geometry of the scalar manifold.11 pages, Latex. Talk given at the ``Workshop on special geometric structures in string theory'', Bonn, September 8-11, 2001High Energy Physics - Theorytext