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A study of the discrete Pv equation: Miura transformations and particular solutions
Authors:K. M. Tamizhmani  A. Ramani  B. Grammaticos  Y. Ohta
Affiliation:(1) Department of Mathematics, Pondicherry University, Kalapet, 605104 Pondicherry, India;(2) CPT, Ecole Polytechnique, CNRS, UPR 14, 91128 Palaiseau, France;(3) LPN, Université Paris VII, Tour 24-14, 5ème étage, 75251 Paris, France;(4) Department of Applied Mathematics, Faculty of Engineering, Hiroshima University, 1-4-1 Kagamiyama, 739 Higashi-Hiroshima, Japan
Abstract:We derive the form of the Miura transformation of the discrete Pv equation and show that it is indeed an auto-Bäcklund transformation, i.e. it relates the discrete Pv to itself. Using this auto-Bäcklund, we obtain the Schlesinger transformations of discrete Pv which relate the solution for one set of the parameters of the equation to that of another set of neighbouring parameters. Finally, we obtain particular solutions of the discrete Pv (i.e. solutions that exist only for some specific values of the parameters). These solutions are of two types: solutions involving the confluent hypergeometric function (on codimension-one submanifold of parameters) and rational solutions (on codimension-two submanifold of parameters).
Keywords:33E30  39A10  58F07  58F08
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