2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/51848Liouville, SL(2,R)/U(1) and SL(2,R)/R_+ coset structures are completely described by gauge invariant Hamiltonian reduction of the SL(2,R) WZNW theory.4 Pages, Latex, Talk at XXIXth International Colloquium on Group Theoretical Methods in Physics, July 15-20, 2002, Paris, France, spelling mistakes correctedHigh Energy Physics - Theorytext