2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/146314We report on progresses on the derivation of pure spinor constraints, BRST algebra and BRST invariant sigma models a la pure spinors from the algebraic structure of the FDA underlying supergravity.Talk given by Pietro Fré at the Workshop Supersymmetry and Quantum Symmetry 2007 held at the Joint Institute for Nuclear Research in Dubna (Russian Federation), July 2007, 15 pp, Latex, 2 figuresHigh Energy Physics - Theorytext