A Bäcklund transformation for the Burgers hierarchy.
A differential geometric setting for dynamic equivalence and dynamic linearization
This paper presents an (infinite-dimensional) geometric framework for control systems, based on infinite jet bundles, where a system is represented by a single vector field and dynamic equivalence (to be precise: equivalence by endogenous dynamic feedback) is conjugation by diffeomorphisms. These diffeomorphisms are very much related to Lie-Bäcklund transformations. It is proved in this framework that dynamic equivalence of single-input systems is the same as static equivalence.
A global factorization theorem for the ZS-AKNS system.
Attracting domains for semi-attractive transformations of Cp.
Let F be a germ of analytic transformation of (Cp, 0). We say that F is semi-attractive at the origin, if F'(0) has one eigenvalue equal to 1 and if the other ones are of modulus strictly less than 1. The main result is: either there exists a curve of fixed points, or F - Id has multiplicity k and there exists a domain of attraction with k - 1 petals. We also study the case where F is a global isomorphism of C2 and F - Id has multiplicity k at the origin. This work has been inspired by two papers:...
Auto-Bäcklund transformation and exact analytical solutions for the Kupershmidt equation.
Bäcklund transformations for several cases of a type of generalized KdV equation.
Bäcklund-Darboux transformation for non-isospectral canonical system and Riemann-Hilbert problem.
Backlund-Darboux Transformations in Sato's Grassmannian
We define Bäcklund–Darboux transformations in Sato’s Grassmannian. They can be regarded as Darboux transformations on maximal algebras of commuting ordinary differential operators. We describe the action of these transformations on related objects: wave functions, tau-functions and spectral algebras.
Calogero-Moser spaces and an adelic -algebra
We introduce a Lie algebra, which we call adelic -algebra. Then we construct a natural bosonic representation and show that the points of the Calogero-Moser spaces are in 1:1 correspondence with the tau-functions in this representation.
Complex timelike isothermic surfaces and their geometric transformations.
Conservation laws for shallow water waves on a sloping beach.
Contact integrable extensions and differential coverings for the generalized (2 + 1)-dimensional dispersionless Dym equation
The method of contact integrable extensions is used to find new differential coverings for the generalized (2 + 1)-dimensional dispersionless Dym equation and corresponding Bäcklund transformations.
Darboux transformation for classical acoustic spectral problem.
Deux applications de la géométrie locale des diffiétés
Exact solutions and localized structures for higher-dimensional Burgers systems.
From elementary algebra to Bäcklund transformations
Infinitesimal Brunovský form for nonlinear systems with applications to Dynamic Linearization
We define, in an infinite-dimensional differential geometric framework, the 'infinitesimal Brunovský form' which we previously introduced in another framework and link it with equivalence via diffeomorphism to a linear system, which is the same as linearizability by 'endogenous dynamic feedback'.
Integrable analytic vector fields with a nilpotent linear part
We study the normalization of analytic vector fields with a nilpotent linear part. We prove that such an analytic vector field can be transformed into a certain form by convergent transformations when it has a non-singular formal integral. We then prove that there are smoothly linearizable parabolic analytic transformations which cannot be embedded into the flows of any analytic vector fields with a nilpotent linear part.
Integrable anisotropic evolution equations on a sphere.
Integrable discrete equations derived by similarity reduction of the extended discrete KP hierarchy.