2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/147098A description of a ring of functions on the base of a universal formal deformation for several moduli problems is given. The answer is given in terms of a homology group of a certain dg Lie algebra canonically (up to an essentially unique quasi-isomorphism) associated with a problem.amslatex (Replacement of the previous version. Minor corrections are made)Algebraic GeometryHigh Energy Physics - Theorytext