2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/100888We describe the Chow ring with rational coefficients of Mbar_{0,1}(P^n,d) as the subring of invariants of a ring B(Mbar_{0,1}(P^n,d);Q), relative to the action of the group of symmetries S_d. We compute B(Mbar_{0,1}(P^n,d);Q) by following a sequence of intermediate spaces for Mbar_{0,1}(P^n,d).Final version, to appear in Inventiones MathematicaeAlgebraic Geometry14D20text