2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/60286We give a construction of Witten's "top Chern class" on the compactified moduli space of curves with higher spin structures and show that it satisfies most of the axioms proposed in math.AG/9905034.23 pages, AMSLatexAlgebraic Geometrytext