2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/53776We discuss the structure, realizations and quantum BRST operators of a class of nonlinear superconformal algebras with N > 4.9 pages, plain tex, CTP TAMU-71/93. (Contribution to the Proceedings of the Trieste Summer School in High Energy Physics and Cosmology, 14 June-30 July 1993, Trieste, Italy.)High Energy Physics - Theorytext