2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/185580A covariant approach to the conformal property associated with Moyal-Lax operators is given. By identifying the conformal covariance with the second Gelfand-Dickey flow, we covariantize Moyal-Lax operators to construct the primary fields of one-parameter deformation of classical $W$-algebras.13 pages, Revtex, no figures, v.2: typos corrected, references added and conclusion modifiedHigh Energy Physics - Theorytext