Mixed type Hermite-Padé approximation inspired by the Degasperis-Procesi equation

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Mixed type Hermite-Padé approximation inspired by the Degasperis-Procesi equation

López Lagomasino, G.; Medina Peralta, S.; Szmigielski, J.

Advances in mathematics, 06/2019, Volume: 349

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In this work we present new results on the convergence of diagonal sequences of certain mixed type Hermite-Padé approximants of a Nikishin system. The study is motivated by a mixed Hermite-Padé approximation scheme used in the construction of solutions of a Degasperis-Procesi peakon problem and germane to the analysis of the inverse spectral problem for the discrete cubic string.

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López Lagomasino, G. | Medina Peralta, S. | Szmigielski, J.

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