2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/70181To various kinds of quadratic functors, homotopy types of two stage spaces are assigned. It is investigated what kind of homotopy types are obtainable in this way.Some misprints correctedAlgebraic TopologyCategory Theory55U99; 55P12; 18G55Quadratic functors and one-connected two stage spacestext