2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/53916We present results of a computation of the BRST-antibracket cohomology in the space of local functionals of the fields and antifields for a class of 2d gravitational theories which are conformally invariant at the classical level. In particular all classical local action functionals, all candidate anomalies and all BRST--invariant functionals depending nontrivially on antifields are given and discussed for these models.14 pages, LaTex, NIKHEF-H 94-16, KUL-TF-94/17, to appear in the proceedings of the `Geometry of Constrained Dynamical Systems' workshop, Isaac Newton Institute for Mathematical Sciences, Cambridge, June 15--18, 1994High Energy Physics - Theorytext