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http://hdl.handle.net/10773/15123
Título: | Characterizations of Δ-Volterra lattice: a symmetric orthogonal polynomials interpretation |
Autor: | Area, I. Branquinho, A. Moreno, A. Foulquié Godoy, E. |
Palavras-chave: | Orthogonal polynomials Difference operators Operator theory Toda lattices |
Data: | 1-Jan-2016 |
Editora: | Elsevier |
Resumo: | In this paper we introduce the Δ-Volterra lattice which is interpreted in terms of symmetric orthogonal polynomials. It is shown that the measure of orthogonality associated with these systems of orthogonal polynomials evolves in t like (1+x2)1−tμ(x)(1+x2)1−tμ(x) where μ is a given positive Borel measure. Moreover, the Δ-Volterra lattice is related to the Δ-Toda lattice from Miura or Bäcklund transformations. The main ingredients are orthogonal polynomials which satisfy an Appell condition with respect to the forward difference operator Δ and the characterization of the point spectrum of a Jacobian operator that satisfies a Δ-Volterra equation (Lax type theorem). We also provide an explicit example of solutions of Δ-Volterra and Δ-Toda lattices, and connect this example with the results presented in the paper. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/15123 |
DOI: | 10.1016/j.jmaa.2015.07.051 |
ISSN: | 0022-247X |
Aparece nas coleções: | CIDMA - Artigos CHAG - Artigos |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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delta_volterra_jmaa_CIDMA.pdf | main article | 325.94 kB | Adobe PDF | Ver/Abrir |
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