Bivariate orthogonal polynomials, 2D Toda lattices and Lax-type pairs

Cleonice F. Bracciali and Teresa E. Pérez

Applied Mathematics and Computation, 2017, vol. 309, issue C, 142-155

Abstract: We explore the connection between an infinite system of particles in R2 described by a bi-dimensional version of the Toda equations with the theory of orthogonal polynomials in two variables. We define a 2D Toda lattice in the sense that we consider only one time variable and two space variables describing a mesh of interacting particles over the plane. We show that this 2D Toda lattice is related with the matrix coefficients of the three term relations of bivariate orthogonal polynomials associated with an exponential modification of a positive measure. Moreover, block Lax pairs for 2D Toda lattices are deduced.

Keywords: Two variable orthogonal polynomials; 2D Toda lattice; Block Lax pairs (search for similar items in EconPapers)
Date: 2017
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Persistent link: https://EconPapers.repec.org/RePEc:eee:apmaco:v:309:y:2017:i:c:p:142-155

DOI: 10.1016/j.amc.2017.04.005

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