2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/130977Here we consider degenerations of stable spin curves for a fixed smoothing of a non-stable curve: we are able to give enumerative results and a description of limits of stable spin curves. We give a geometrically meaningful definition of spin curves over non-stable curves.New version, 25 pages, 9 figuresAlgebraic Geometrytext