2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/53980The structure of classical non-linear $\cw$ algebras closing on rational functions is analyzed both for the ordinary and the supersymmetric case. Such algebras appear as a result of a coset construction. Their relevance to physical applications is pointed out.8 pages, LaTex, Talk given at Rakhov, February 1994High Energy Physics - Theorytext