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We establish a Liouville type theorem for some conformally invariant fully nonlinear equations

Analysis of PDEs · Mathematics 2007-05-23 Aobing Li , YanYan Li

The Darboux transformation on matrix solutions to the generalized coupled dispersionless integrable system based on some non-abelian Lie group, is studied and the solutions are shown to be expressed in terms of quasideterminants. As an…

Mathematical Physics · Physics 2015-05-14 M. Hassan

The Darboux-Dressing Transformations are applied to the Lax pair associated to systems of coupled nonlinear wave equations in the case of boundary values which are appropriate to both bright and dark soliton solutions. The general formalism…

Exactly Solvable and Integrable Systems · Physics 2015-06-26 Antonio Degasperis , Sara Lombardo

We present a unified operator-theoretic framework for constructing deterministic KdV soliton gases and step-type KdV solutions. Starting from Dyson's determinantal formula, we obtain a broad class of reflectionless solutions and describe…

Mathematical Physics · Physics 2025-12-16 Alexei Rybkin

A new Darboux transformation is presented for the Hirota-Satsuma coupled KdV system. It is shown that this Darboux transformation can be constructed by means of two methods: Painlev\'{e} analysis and reduction of a binary Darboux…

Exactly Solvable and Integrable Systems · Physics 2015-06-26 Heng Chun Hu , Q. P. Liu

We present some further results on Liouville type theorems for some conformally invariant fully nonlinear equations.

Analysis of PDEs · Mathematics 2007-05-23 Aobing Li , YanYan Li

This paper is concerned with a generalized type of Darboux transformations defined in terms of a twisted derivation $D$ satisfying $D(AB)=D(A)+\sigma(A)B$ where $\sigma$ is a homomorphism. Such twisted derivations include regular…

Exactly Solvable and Integrable Systems · Physics 2015-05-14 C. X. Li , J. J. C. Nimmo

We prove that second-order hyperbolic Monge-Ampere equations for one function of two variables are connected to the wave equation by a Backlund transformation if and only if they are integrable by the method of Darboux at second order. One…

Differential Geometry · Mathematics 2008-06-27 Jeanne N. Clelland , Thomas A. Ivey

Lax pairs with operator valued coefficients, which are explicitly connected by means of an additional condition, are considered. This condition is proved to be covariant with respect to the Darboux transformation of a general form.…

Exactly Solvable and Integrable Systems · Physics 2016-09-08 Jan L. Cieslinski , Marek Czachor , Nikolai V. Ustinov

We construct linear and quadratic Darboux matrices compatible with the reduction group of the Lax operator for each of the seven known non-Abelian derivative nonlinear Schr\"odinger equations that admit Lax representations. The…

Exactly Solvable and Integrable Systems · Physics 2025-07-30 Edoardo Peroni , Jing Ping Wang

Darboux transformation plays a key role in constructing explicit closed-form solutions of completely integrable systems. This paper provides an algebraic construction of generalized Darboux matrices with the same poles for the $2\times2$…

Exactly Solvable and Integrable Systems · Physics 2024-11-26 Yu-Yue Li , Deng-Shan Wang

In the KdV context we put forward a continuous version of the binary Darboux transformation (aka the double commutation method). Our approach is based on the Riemann-Hilbert problem and yields a new explicit formula for perturbation of the…

Mathematical Physics · Physics 2023-04-11 Alexei Rybkin

New extensions of the KP and modified KP hierarchies with self-consistent sources are proposed. The latter provide new generalizations of $(2+1)$-dimensional integrable equations, including the DS-III equation and the $N$-wave problem.…

Exactly Solvable and Integrable Systems · Physics 2015-04-13 Oleksandr Chvartatskyi , Yuriy Sydorenko

Painleve analysis and the singular manifold method are the tools used in this paper to perform a complete study of an equation in 2+1 dimensions. This procedure has allowed us to obtain the Lax pair, Darboux transformation and tau functions…

solv-int · Physics 2007-05-23 Pilar Garcia Estevez

In this paper, we obtain a uniform Darboux transformation for multi-component coupled NLS equations, which can be reduced to all previous presented Darboux transformation. As a direct application, we derive the single dark soliton and…

Exactly Solvable and Integrable Systems · Physics 2013-09-05 Liming Ling , Li-Chen Zhao , Boling Guo

Darboux transformations are non-group type symmetries of linear differential operators. One can define Darboux transformations algebraically by the intertwining relation $ML=L_1M$ or the intertwining relation $ML=L_1N$ in the cases when the…

Mathematical Physics · Physics 2020-01-07 Ekaterina Shemyakova

In this paper, we consider the two component derivative nonlinear Schr\"{o}dinger equation and present a simple Darboux transformation for it. By iterating this Darboux transformation, we construct a compact representation for the…

Exactly Solvable and Integrable Systems · Physics 2015-05-14 Liming Ling , Q. P. Liu

In the recent comment quoted in the title (arXiv:1407.7852v1), a comment is presented on our recent work which derive a generalized nonlinear wave solution formula for mixed coupled nonlinear Sch\"{o}dinger equations by performing the…

Exactly Solvable and Integrable Systems · Physics 2014-08-12 Liming Ling , Li-Chen Zhao , Boling Guo

The note offers a proof of Darboux and Liouville theorems from a symplectic group action perspective.

Symplectic Geometry · Mathematics 2015-03-26 Romero Solha

We obtain the well-known discrete modified Boussinesq equation in two-component form as well as its Lax pair in $3\times3$ matrix form through a 3-periodic reduction technique on the Hirota-Miwa equation and its Lax pair. We describe how…

Exactly Solvable and Integrable Systems · Physics 2018-04-05 Ying Shi , Junxiao Zhao