Conformal Covariantization of Moyal-Lax Operators
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A 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 modified
13 pages, Revtex, no figures, v.2: typos corrected, references added and conclusion modified