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We construct a gauged linear sigma-model representation and develop a1/N-expansion for flag manifold sigma-models previously proposed by the author.Classically there exists a zero-curvature representation for the equations ofmotion of these models, which leads in particular to the existence of aconserved non-local charge. We show that at the quantum level this charge is nolonger conserved and calculate explicitly the anomaly in its conservation law.

Flag manifold sigma-models: the 1/N-expansion and the anomaly two-form