Polynomial approximation and  twenty years later.

Ditzian, Z.

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Müntz type theorems. I.

Almira, J.M. (2007)

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Constructive function theory on sets of the complex plane through potential theory and geometric function theory.

Andrievskii, V.V. (2006)

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The generalized de Rham-Hodge theory aspects of Delsarte-Darboux type transformations in multidimension

Anatoliy Samoilenko, Yarema Prykarpatsky, Anatoliy Prykarpatsky (2005)

Open Mathematics

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The differential-geometric and topological structure of Delsarte transmutation operators and their associated Gelfand-Levitan-Marchenko type eqautions are studied along with classical Dirac type operator and its multidimensional affine extension, related with selfdual Yang-Mills eqautions. The construction of soliton-like solutions to the related set of nonlinear dynamical system is discussed.