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Teoreticheskaya i Matematicheskaya Fizika, 2019, Volume 198, Number 2, Pages 225–245
DOI: https://doi.org/10.4213/tmf9546
(Mi tmf9546)
 

This article is cited in 7 scientific papers (total in 7 papers)

Strict versions of integrable hierarchies in pseudodifference operators and the related Cauchy problems

G. F. Helmincka, V. A. Poberezhnybc, S. V. Polenkovad

a Korteweg-de Vries Institute for Mathematics, University of Amsterdam, Amsterdam, The Netherlands
b Institute for Theoretical and Experimental Physics, Moscow, Russia
c National Research University "Higher School of Economics", Moscow, Russia
d University of Twente, Enschede, The Netherlands
Full-text PDF (521 kB) Citations (7)
References:
Abstract: In the algebra PsΔ of pseudodifference operators, we consider two deformations of the Lie subalgebra spanned by positive powers of an invertible constant first-degree pseudodifference operator Λ0. The first deformation is by the group in PsΔ corresponding to the Lie subalgebra PsΔ<0 of elements of negative degree, and the second is by the group corresponding to the Lie subalgebra PsΔ0 of elements of degree zero or lower. We require that the evolution equations of both deformations be certain compatible Lax equations that are determined by choosing a Lie subalgebra depending on Λ0 that respectively complements the Lie subalgebra PsΔ<0 or PsΔ0. This yields two integrable hierarchies associated with Λ0, where the hierarchy of the wider deformation is called the strict version of the first because of the form of the Lax equations. For Λ0 equal to the matrix of the shift operator, the hierarchy corresponding to the simplest deformation is called the discrete KP hierarchy. We show that the two hierarchies have an equivalent zero-curvature form and conclude by discussing the solvability of the related Cauchy problems.
Keywords: pseudodifference operator, Lax equation, zero-curvature form, Cauchy problem.
Funding agency Grant number
Ministry of Education and Science of the Russian Federation 5-100
Russian Science Foundation 16-11-10160
Russian Foundation for Basic Research 17-01-00585
Simons Foundation
This research was supported in the framework of government support of leading universities of the Russian Federation “5-100”.
The basic results in Sec. 4 were obtained with support from a grant from the Russian Science Foundation (Project No. 16-11-10160).
The research of V. A. Poberezhny was supported in part by the Russian Foundation for Basic Research (Grant No. 17-01-00585) and the Simons Foundation.
Received: 14.02.2018
Revised: 14.02.2018
English version:
Theoretical and Mathematical Physics, 2019, Volume 198, Issue 2, Pages 197–214
DOI: https://doi.org/10.1134/S004057791902003X
Bibliographic databases:
Document Type: Article
Language: Russian
Citation: G. F. Helminck, V. A. Poberezhny, S. V. Polenkova, “Strict versions of integrable hierarchies in pseudodifference operators and the related Cauchy problems”, TMF, 198:2 (2019), 225–245; Theoret. and Math. Phys., 198:2 (2019), 197–214
Citation in format AMSBIB
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  • https://doi.org/10.4213/tmf9546
  • https://www.mathnet.ru/eng/tmf/v198/i2/p225
  • This publication is cited in the following 7 articles:
    1. Aloysius G. Helminck, Gerardus F. Helminck, “A construction of solutions of an integrable deformation of a commutative Lie algebra of skew hermitian Z×Z-matrices”, Indagationes Mathematicae, 2024  crossref
    2. G. F. Helminck, V. A. Poberezhny, S. V. Polenkova, “Darboux transformations for the discrete versions of the KP and strict KP hierarchies”, Theoret. and Math. Phys., 221:3 (2024), 2031–2048  mathnet  crossref  crossref  adsnasa
    3. G. F. Helminck, V. A. Poberezhny, S. V. Polenkova, “Connecting KP and Strict KP with Their Discrete Versions”, Lobachevskii J Math, 45:10 (2024), 4644  crossref
    4. G. F. Helminck, “Cauchy problems related to integrable matrix hierarchies”, Theoret. and Math. Phys., 216:2 (2023), 1124–1141  mathnet  crossref  crossref  mathscinet  adsnasa
    5. G. F. Helminck, V. A. Poberezhny, S. V. Polenkova, “Minimal realizations and scaling invariance of the discrete KP hierarchy and its strict version”, Theoret. and Math. Phys., 213:1 (2022), 1348–1361  mathnet  crossref  crossref  mathscinet  adsnasa
    6. G. F. Helminck, V. A. Poberezhny, S. V. Polenkova, “Extensions of the discrete KP hierarchy and its strict version”, Theoret. and Math. Phys., 204:3 (2020), 1140–1153  mathnet  crossref  crossref  mathscinet  adsnasa  isi  elib
    7. G. F. Helminck, J. A. Weenink, “Integrable Hierarchies in the N X N-matrices Related to Powers of the Shift Operator”, J. Geom. Phys., 148 (2020), 103560  crossref  mathscinet  zmath  isi
    Citing articles in Google Scholar: Russian citations, English citations
    Related articles in Google Scholar: Russian articles, English articles
    Теоретическая и математическая физика Theoretical and Mathematical Physics
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