Hamiltonian partial differential equations and Painlevé transcendents
|
|
- Felix Hall
- 5 years ago
- Views:
Transcription
1 The 6th TIMS-OCAMI-WASEDA Joint International Workshop on Integrable Systems and Mathematical Physics March 22-26, 2014 Hamiltonian partial differential equations and Painlevé transcendents Boris DUBROVIN SISSA, Trieste 1
2 Cauchy problem for evolutionary PDEs with slow varying initial data Introduction into Hamiltonian PDEs On perturbative approach to integrability Phase transitions from regular to oscillatory behavior. Universality conjecture and Painlevé transcendents 2
3 System u t = F (u; u x, u xx,...) (1) R.h.s. analytic in jets at (u;0, 0,...) and F (u;0, 0,...) 0 ) n-dimensional family of constant solutions (n=dim u) Slow-varying solutions u(x) =f( x), u x = O( ), u xx = O 2 Rescale x 7! x, t 7! t and expand u t = 1 F u; u x, 2 u xx,... = A(u)u x + B 1 (u)u xx + B 2 (u)u 2 x + 2 C 1 (u)u xxx + C 2 (u)u xx u x + C 3 (u)u 3 x
4 Question 1: existence of solutions to (1) with slow varying! initial data Idea: for small times solutions to (1) u t = A(u)u x + B 1 (u)u xx + B 2 (u)u 2 x + 2 C 1 (u)u xxx + C 2 (u)u xx u x + C 3 (u)u 3 x... (1) and u t = A(u)u x (2) with the same initial date are close before the time of gradient catastrophe of (2) 4
5 Question 2: comparison of solutions to (1) ( perturbed ) and (2) ( unperturbed ) near the point of gradient catastrophe of (2) = point of phase transition of (1) Two main classes: dissipative perturbations, e.g., Burgers equation shock waves; u t + uu x = u xx or Hamiltonian (i.e., conservative) perturbations, e.g., Korteweg - de Vries equation oscillatory behaviour u t + uu x + 2 u xxx =0 5
6 Examples of Hamiltonian PDEs 1) KdV u t + uu x + ɛ2 12 u xxx =0, u t x H u(x) =0 H = In the zero dispersion limit =0 Z apple u u2 x dx Hopf equation u t + uu x =0 2) Toda lattice ɛu t = v(x) v(x ɛ) ɛv t = e u(x+ɛ) e u(x) } (n = 2) Long wave limit u t = v x v t = e u u x 6
7 More general class of systems of the Fermi-Pasta-Ulam type H = N n=1 p 2 n 2 + V (q n q n 1 ) For large N the equations of motion can be replaced by u t = 1 [v(x) v(x )] v t = 1 [V (u(x + )) V (u(x)] p n = v(n ), q n q n 1 = u(n ), = 1 N In the leading term one obtains an integrable PDE u t = v x v t = V (u)u x 7
8 3) Nonlinear Schrödinger equation i t xx + 2 =0 In the real-valued variables u = 2 x, v = 2i can be recast into the form x u t +(uv) x =0 v t + vv x u x u 2 x u 2 u xx u x =0 8
9 The Hamiltonian formulation u t + x v t + x H v(x) =0 H u(x) =0 H = 1 2 uv2 u u u2 x dx Hamiltonian operator
10 General setting Class of systems of PDEs depending on a small parameter u t = A(u)u x + A 2 (u; u x, u xx )+ 2 A 3 (u; u x, u xx, u xxx )+... u =(u 1,...,u n ) Terms of order ɛ k are differential polynomals of degree k +1 deg u (m) = m, m =1, 2,... 10
11 ε -dependent dynamical systems on the space of vector-functions u(x) u(x, t; ) solution of the Cauchy problem initial point u 0 (x) 11
12 Hamiltonian formulation u t = F (u; u x, u xx,...)=p H u(x) Hamiltonian local functional H H = 1 2 Z 2 0 h (u; u x, u xx,...) dx (the case of 2π-periodic function) u(x) = Euler - Lagrange operator of h H u i x i x i xx... 12
13 Finally, in the representation u t = F (u; u x, u xx,...)=p H u(x) P = P ij is the matrix-valued operator of Poisson bracket {F, G} = 1 2 Z 2 0 F u i (x) P ij G u j (x) dx bilinearity skew symmetry {G, F } = {F, G} Jacobi identity {{F, G},H} + {{H, F},G} + {{G, H},F} =0 13
14 For example, any linear skew-symmetric matrix operator with constant coefficients P ij = X k P ij x P ji k =( 1)k+1 P ij k defines a Poisson bracket 0 1 For KdV P x, for NLS P = 1 x More general class P ij = X k P ij k (u; u x,...)@ k x 14
15 After rescaling x 7! x obtain P ij = X k 0 k+1 k X s=0 P ij k,s (u; u x,...,u (s) )@ x k s+1 15
16 This class is invariant with respect of the group of Miura-type transformations of the form u ũ = F 0 (u)+ F 1 (u, u x )+ 2 F 2 (u, u x, u xx )+... deg F k (u, u x,...,u (k) )=k det DF 0 (u) Du =0 16
17 Thm. Assuming any Hamiltonian operator is equivalent to Proof uses the theory of Poisson brackets of hydrodynamic type (B.D., S.Novikov, 1983) and triviality of Poisson cohomology (E. Getzler; F.Magri et al., 2001) So, any Hamiltonian PDEs can be written in the form Local Hamiltonians H = H 0 + H H 2 + = Z [h 0 (u)+ h 1 (u; u x )+ 2 h 2 (u; u x, u xx )+...]dx 17
18 Perturbative approach to integrability of PDEs (B.D., Youjin Zhang) Integrable Hamiltonian system Complete family of commuting first integrals Definition. Perturbed Hamiltonian is integrable if every can be deformed to a first integral of and 18
19 Homological equation etc. Remark. Regularity of commutativity of the centralizor Example. Hopf equation is integrable: commuting first integrals are for an arbitrary function 19
20 Proof. where An example of integrable deformation: KdV 20
21 Claim. For any function f(u) there exists a first integral of KdV equation 21
22 An explicit formula in terms of Lax operator L = 2 2 d 2 dx 2 + u(x) Then where 22
23 More general second order perturbations H = H H 2 = Z apple 1 6 u c(u)u2 x dx Thm. (B.D., J.Ekstrand, Di Yang) Integrability iff Lax operator It gives only half of the first integrals, for odd 23
24 Back to general case The main goal: to compare the properties of solutions to the perturbed system u t = A(u)u x + A 2 (u; u x, u xx )+ 2 A 3 (u; u x, u xx, u xxx )+... with solutions to the dispersionless limit 0 u t = A(u)u x 24
25 Back to general case The main goal: to compare the properties of solutions to the perturbed system u t = A(u)u x + A 2 (u; u x, u xx )+ 2 A 3 (u; u x, u xx, u xxx )+... with solutions to the dispersionless limit 0 Hamiltonian u t = A(u)u x 24
26 Back to general case The main goal: to compare the properties of solutions to the perturbed system u t = A(u)u x + A 2 (u; u x, u xx )+ 2 A 3 (u; u x, u xx, u xxx )+... with solutions to the dispersionless limit 0 Hamiltonian u t = A(u)u x completely integrable 24
27 Back to general case The main goal: to compare the properties of solutions to the perturbed system u t = A(u)u x + A 2 (u; u x, u xx )+ 2 A 3 (u; u x, u xx, u xxx )+... with solutions to the dispersionless limit 0 Hamiltonian u t = A(u)u x completely integrable finite life span (nonlinearity!) 24
28 For the dispersionless system u t = A(u)u x a gradient catastrophe takes place: the solution exists for t<t 0, there exists the limit lim u(x, t) t t 0 but, for some x 0 u x (x, t), u t (x, t) for (x, t) (x 0,t 0 ) The problem: to describe the asymptotic behaviour of the generic solution u(x, t; ), u(x, 0; )=u 0 (x) to the perturbed system for 0 in a neighborhood of the point of catastrophe (x 0,t 0 ) 25
29 Gradient catastrophe for Hopf equation u t + uu x =0 26
30 Perturbation: Burgers equation u t + uu x = ɛu xx (dissipative case) 27
31 Perturbation: KdV equation u t + uu x + ɛ 2 u xxx =0 (Hamiltonian case) 28
32 The smaller is, the faster are the oscillations 1!= != u 0 u x x 1!= != u 0 u x x 29
33 Nonlinear Schrödinger equation (the focusing case) i t xx + 2 =0 u t v t NB: the dispersionless limit is a PDE of elliptic type + v u 1 v ux v x =0 = v ± i u, eigenvalues 30
34 31
35 Main Conjecture (B.D., 2005): a finite list of types of the critical behaviour 32
36 Main Conjecture (B.D., 2005): a finite list of types of the critical behaviour (Universality) 32
37 Universality for the generalized Burgers equation (A.Il in 1985) u t + a(u)u x = u xx u(x, t; ) =u 0 + 1/4 x x0 a 0 (t t 0 ) 3/4, t t 0 1/2 + O 1/2 Here (, ) is the logarithmic derivative of the Pearcey function (, ) = 2 log e 1 8(z 4 2z 2 +4z ) dz 33
38 What kind of special functions is needed for the Hamiltonian case? Painlevé-1 equation U 00 =6U 2 X (P I ) and its 4th order analogue X = TU [ 1 6 U ( U 2 +2UU ) U IV ] (P 2 I ) 34
39 Isomonodromy representation for P 2 I U = 0 1 2U
40 apple d d W( ), d dx U( ) =0, P 2 I apple d dt V( ), d dx U( ) =0, KdV So, solutions to P 2 I satisfy KdV X = TU 1 6 U U 02 +2UU U IV U T + UU X U XXX =0 9 = ; U = U(X, T) 36
41 Digression. Consider an analogue of P 2 I with constant coefficients a, b, c a = bu + c 1 2 U apple 1 24 U 00 6 U U 02 +2UU U IV Thm. (S.P.Novikov; P.Lax, 1974) Any smooth solution to this ODE is a two-gap potential of Schrödinger operator E.g., take a = 9 L = 1 2 d 2 dx 2 + U(X) 40 g 3, b = 7 40 g 2, c =0, then U = 3} (X; g 2,g 3 ) is a solution 37
42 Solving KdV equation U T + UU X U XXX =0 with initial data U(X, 0) = 3}(X) one obtains a family of two-gap potentials For T=0 the three poles merge Only triple collisions! 38
43 Back to P 2 I X = TU [ 1 6 U ( U 2 +2UU ) U IV ] Looking for common solutions with KdV U T + UU X U XXX =0 Lemma (B.D., A.Kapaev) Poles of satisfy (cf. S.Shimomura 2001) 39
44 Proof by substitution of Laurent expansion Poles of second type of solutions to P 2 I equation are not compatible with KdV dynamics. They correspond to triple collisions 40
45 I.e., the function has a triple branch point at So the equation for pole dynamics does not satisfy the Painlevé property Triple branch points depends on the choice of a solution, hence movable critical singularities; to be determined from a spectral problem for Schrödinger equation with quintic potential 41
46 NB: the equation also admits an isomonodromy representation!, 42
47 Thm. (T.Claeys, M.Vanlessen, 2008) For any real T there exists unique solution U(X, T) smooth for all X 2 R satisfying to P 2 I U(X, T) ' (6X) 1/3 2 2/3 T, X!1 (3X) ( 1/3) 43
48 The Whitham approximation requires an improvement 0.8!= != u u x x KdV Whitham (T.Grava, C.Klein, 2005) 44
Hamiltonian partial differential equations and Painlevé transcendents
Winter School on PDEs St Etienne de Tinée February 2-6, 2015 Hamiltonian partial differential equations and Painlevé transcendents Boris DUBROVIN SISSA, Trieste Cauchy problem for evolutionary PDEs with
More informationHamiltonian partial differential equations and Painlevé transcendents
The 6th TIMS-OCAMI-WASEDA Joint International Workshop on Integrable Systems and Mathematical Physics March 22-26, 2014 Hamiltonian partial differential equations and Painlevé transcendents Boris DUBROVIN
More informationHamiltonian partial differential equations and Painlevé transcendents
Winter School on PDEs St Etienne de Tinée February 2-6, 2015 Hamiltonian partial differential equations and Painlevé transcendents Boris DUBROVIN SISSA, Trieste Lecture 2 Recall: the main goal is to compare
More informationOn universality of critical behaviour in Hamiltonian PDEs
Riemann - Hilbert Problems, Integrability and Asymptotics Trieste, September 23, 2005 On universality of critical behaviour in Hamiltonian PDEs Boris DUBROVIN SISSA (Trieste) 1 Main subject: Hamiltonian
More informationNumerical solutions of the small dispersion limit of KdV, Whitham and Painlevé equations
Numerical solutions of the small dispersion limit of KdV, Whitham and Painlevé equations Tamara Grava (SISSA) joint work with Christian Klein (MPI Leipzig) Integrable Systems in Applied Mathematics Colmenarejo,
More informationOn Hamiltonian perturbations of hyperbolic PDEs
Bologna, September 24, 2004 On Hamiltonian perturbations of hyperbolic PDEs Boris DUBROVIN SISSA (Trieste) Class of 1+1 evolutionary systems w i t +Ai j (w)wj x +ε (B i j (w)wj xx + 1 2 Ci jk (w)wj x wk
More informationOn critical behaviour in systems of Hamiltonian partial differential equations
On critical behaviour in systems of Hamiltonian partial differential equations arxiv:1311.7166v1 [math-ph] 7 Nov 13 B. Dubrovin, T. Grava, C. Klein, A. Moro Abstract We study the critical behaviour of
More informationPartition function of one matrix-models in the multi-cut case and Painlevé equations. Tamara Grava and Christian Klein
Partition function of one matrix-models in the multi-cut case and Painlevé equations Tamara Grava and Christian Klein SISSA IMS, Singapore, March 2006 Main topics Large N limit beyond the one-cut case
More informationIntegrable viscous conservation laws
Integrable viscous conservation laws Alessandro Arsie a), Paolo Lorenzoni b), Antonio Moro b,c) arxiv:1301.0950v3 [math-ph] 5 Jun 014 a) Department of Mathematics and Statistics University of Toledo, 801
More informationOn the singularities of non-linear ODEs
On the singularities of non-linear ODEs Galina Filipuk Institute of Mathematics University of Warsaw G.Filipuk@mimuw.edu.pl Collaborators: R. Halburd (London), R. Vidunas (Tokyo), R. Kycia (Kraków) 1 Plan
More information2. Examples of Integrable Equations
Integrable equations A.V.Mikhailov and V.V.Sokolov 1. Introduction 2. Examples of Integrable Equations 3. Examples of Lax pairs 4. Structure of Lax pairs 5. Local Symmetries, conservation laws and the
More informationMath 575-Lecture 26. KdV equation. Derivation of KdV
Math 575-Lecture 26 KdV equation We look at the KdV equations and the so-called integrable systems. The KdV equation can be written as u t + 3 2 uu x + 1 6 u xxx = 0. The constants 3/2 and 1/6 are not
More informationMACSYMA PROGRAM FOR THE PAINLEVÉ TEST FOR NONLINEAR ORDINARY AND PARTIAL DIFFERENTIAL EQUATIONS
. MACSYMA PROGRAM FOR THE PAINLEVÉ TEST FOR NONLINEAR ORDINARY AND PARTIAL DIFFERENTIAL EQUATIONS Willy Hereman Mathematics Department and Center for the Mathematical Sciences University of Wisconsin at
More informationDispersionless integrable systems in 3D and Einstein-Weyl geometry. Eugene Ferapontov
Dispersionless integrable systems in 3D and Einstein-Weyl geometry Eugene Ferapontov Department of Mathematical Sciences, Loughborough University, UK E.V.Ferapontov@lboro.ac.uk Based on joint work with
More informationSYMBOLIC SOFTWARE FOR SOLITON THEORY: INTEGRABILITY, SYMMETRIES CONSERVATION LAWS AND EXACT SOLUTIONS. Willy Hereman
. SYMBOLIC SOFTWARE FOR SOLITON THEORY: INTEGRABILITY, SYMMETRIES CONSERVATION LAWS AND EXACT SOLUTIONS Willy Hereman Dept. of Mathematical and Computer Sciences Colorado School of Mines Golden, Colorado
More informationApplied Math Qualifying Exam 11 October Instructions: Work 2 out of 3 problems in each of the 3 parts for a total of 6 problems.
Printed Name: Signature: Applied Math Qualifying Exam 11 October 2014 Instructions: Work 2 out of 3 problems in each of the 3 parts for a total of 6 problems. 2 Part 1 (1) Let Ω be an open subset of R
More informationON POISSON BRACKETS COMPATIBLE WITH ALGEBRAIC GEOMETRY AND KORTEWEG DE VRIES DYNAMICS ON THE SET OF FINITE-ZONE POTENTIALS
ON POISSON BRACKETS COMPATIBLE WITH ALGEBRAIC GEOMETRY AND KORTEWEG DE VRIES DYNAMICS ON THE SET OF FINITE-ZONE POTENTIALS A. P. VESELOV AND S. P. NOVIKOV I. Some information regarding finite-zone potentials.
More informationSymmetry Reductions of (2+1) dimensional Equal Width. Wave Equation
Authors: Symmetry Reductions of (2+1) dimensional Equal Width 1. Dr. S. Padmasekaran Wave Equation Asst. Professor, Department of Mathematics Periyar University, Salem 2. M.G. RANI Periyar University,
More informationSymbolic Computation of Conserved Densities and Symmetries of Nonlinear Evolution and Differential-Difference Equations WILLY HEREMAN
. Symbolic Computation of Conserved Densities and Symmetries of Nonlinear Evolution and Differential-Difference Equations WILLY HEREMAN Joint work with ÜNAL GÖKTAŞ and Grant Erdmann Graduate Seminar Department
More informationarxiv: v1 [math.ap] 23 Apr 2008
ON UNIVERSALITY OF CRITICAL BEHAVIOUR IN HAMILTONIAN PDES arxiv:0804.3790v1 [math.ap] 3 Apr 008 BORIS DUBROVIN Dedicated to Sergei Petrovich Novikov on the occasion o his 70th birthday. Abstract. Our main
More informationTheory of PDE Homework 2
Theory of PDE Homework 2 Adrienne Sands April 18, 2017 In the following exercises we assume the coefficients of the various PDE are smooth and satisfy the uniform ellipticity condition. R n is always an
More informationPadé approximations of the Painlevé transcendents. Victor Novokshenov Institute of Mathematics Ufa Scientific Center Russian Academy of Sciences
Padé approximations of the Painlevé transcendents Victor Novokshenov Institute of Mathematics Ufa Scientific Center Russian Academy of Sciences Outline Motivation: focusing NLS equation and PI Poles of
More informationAlexei F. Cheviakov. University of Saskatchewan, Saskatoon, Canada. INPL seminar June 09, 2011
Direct Method of Construction of Conservation Laws for Nonlinear Differential Equations, its Relation with Noether s Theorem, Applications, and Symbolic Software Alexei F. Cheviakov University of Saskatchewan,
More informationLecture 10: Whitham Modulation Theory
Lecture 10: Whitham Modulation Theory Lecturer: Roger Grimshaw. Write-up: Andong He June 19, 2009 1 Introduction The Whitham modulation theory provides an asymptotic method for studying slowly varying
More informationContinuous limits and integrability for a semidiscrete system Zuo-nong Zhu Department of Mathematics, Shanghai Jiao Tong University, P R China
Continuous limits and integrability for a semidiscrete system Zuo-nong Zhu Department of Mathematics, Shanghai Jiao Tong University, P R China the 3th GCOE International Symposium, Tohoku University, 17-19
More informationNumerical computation of the finite-genus solutions of the Korteweg-de Vries equation via Riemann Hilbert problems
Numerical computation of the finite-genus solutions of the Korteweg-de Vries equation via Riemann Hilbert problems Thomas Trogdon 1 and Bernard Deconinck Department of Applied Mathematics University of
More informationIntegrability approaches to differential equations
XXIV Fall Workshop on Geometry and Physics Zaragoza, CUD, September 2015 What is integrability? On a fairly imprecise first approximation, we say integrability is the exact solvability or regular behavior
More informationEqWorld INDEX.
EqWorld http://eqworld.ipmnet.ru Exact Solutions > Basic Handbooks > A. D. Polyanin and V. F. Zaitsev, Handbook of Nonlinear Partial Differential Equations, Chapman & Hall/CRC, Boca Raton, 2004 INDEX A
More informationMATHEMATICAL STRUCTURES IN CONTINUOUS DYNAMICAL SYSTEMS
MATHEMATICAL STRUCTURES IN CONTINUOUS DYNAMICAL SYSTEMS Poisson Systems and complete integrability with applications from Fluid Dynamics E. van Groesen Dept. of Applied Mathematics University oftwente
More informationContinuous and Discrete Homotopy Operators with Applications in Integrability Testing. Willy Hereman
Continuous and Discrete Homotopy Operators with Applications in Integrability Testing Willy Hereman Department of Mathematical and Computer Sciences Colorado School of Mines Golden, Colorado, USA http://www.mines.edu/fs
More informationLinearization of Mirror Systems
Journal of Nonlinear Mathematical Physics 00, Volume 9, Supplement 1, 34 4 Proceedings: Hong Kong Linearization of Mirror Systems Tat Leung YEE Department of Mathematics, The Hong Kong University of Science
More informationStable solitons of the cubic-quintic NLS with a delta-function potential
Stable solitons of the cubic-quintic NLS with a delta-function potential François Genoud TU Delft Besançon, 7 January 015 The cubic-quintic NLS with a δ-potential We consider the nonlinear Schrödinger
More informationA Numerical Solution of the Lax s 7 th -order KdV Equation by Pseudospectral Method and Darvishi s Preconditioning
Int. J. Contemp. Math. Sciences, Vol. 2, 2007, no. 22, 1097-1106 A Numerical Solution of the Lax s 7 th -order KdV Equation by Pseudospectral Method and Darvishi s Preconditioning M. T. Darvishi a,, S.
More informationCanonically conjugate variables for the periodic Camassa-Holm equation
arxiv:math-ph/21148v2 15 Mar 24 Canonically conjugate variables for the periodic Camassa-Holm equation Alexei V. Penskoi Abstract The Camassa-Holm shallow water equation is known to be Hamiltonian with
More informationDiagonalization of the Coupled-Mode System.
Diagonalization of the Coupled-Mode System. Marina Chugunova joint work with Dmitry Pelinovsky Department of Mathematics, McMaster University, Canada Collaborators: Mason A. Porter, California Institute
More informationYair Zarmi Physics Department & Jacob Blaustein Institutes for Desert Research Ben-Gurion University of the Negev Midreshet Ben-Gurion, Israel
PERTURBED NONLINEAR EVOLUTION EQUATIONS AND ASYMPTOTIC INTEGRABILITY Yair Zarmi Physics Department & Jacob Blaustein Institutes for Desert Research Ben-Gurion University of the Negev Midreshet Ben-Gurion,
More informationThe Construction of Alternative Modified KdV Equation in (2 + 1) Dimensions
Proceedings of Institute of Mathematics of NAS of Ukraine 00, Vol. 3, Part 1, 377 383 The Construction of Alternative Modified KdV Equation in + 1) Dimensions Kouichi TODA Department of Physics, Keio University,
More informationExact solutions through symmetry reductions for a new integrable equation
Exact solutions through symmetry reductions for a new integrable equation MARIA LUZ GANDARIAS University of Cádiz Department of Mathematics PO.BOX, 1151 Puerto Real, Cádiz SPAIN marialuz.gandarias@uca.es
More informationPoisson Manifolds Bihamiltonian Manifolds Bihamiltonian systems as Integrable systems Bihamiltonian structure as tool to find solutions
The Bi hamiltonian Approach to Integrable Systems Paolo Casati Szeged 27 November 2014 1 Poisson Manifolds 2 Bihamiltonian Manifolds 3 Bihamiltonian systems as Integrable systems 4 Bihamiltonian structure
More informationMultisolitonic solutions from a Bäcklund transformation for a parametric coupled Korteweg-de Vries system
arxiv:407.7743v3 [math-ph] 3 Jan 205 Multisolitonic solutions from a Bäcklund transformation for a parametric coupled Korteweg-de Vries system L. Cortés Vega*, A. Restuccia**, A. Sotomayor* January 5,
More informationExact Solutions for a Fifth-Order Two-Mode KdV Equation with Variable Coefficients
Contemporary Engineering Sciences, Vol. 11, 2018, no. 16, 779-784 HIKARI Ltd, www.m-hikari.com https://doi.org/10.12988/ces.2018.8262 Exact Solutions for a Fifth-Order Two-Mode KdV Equation with Variable
More informationA Very General Hamilton Jacobi Theorem
University of Salerno 9th AIMS ICDSDEA Orlando (Florida) USA, July 1 5, 2012 Introduction: Generalized Hamilton-Jacobi Theorem Hamilton-Jacobi (HJ) Theorem: Consider a Hamiltonian system with Hamiltonian
More informationBasic Concepts and the Discovery of Solitons p. 1 A look at linear and nonlinear signatures p. 1 Discovery of the solitary wave p. 3 Discovery of the
Basic Concepts and the Discovery of Solitons p. 1 A look at linear and nonlinear signatures p. 1 Discovery of the solitary wave p. 3 Discovery of the soliton p. 7 The soliton concept in physics p. 11 Linear
More informationTHE LAX PAIR FOR THE MKDV HIERARCHY. Peter A. Clarkson, Nalini Joshi & Marta Mazzocco
Séminaires & Congrès 14, 006, p. 53 64 THE LAX PAIR FOR THE MKDV HIERARCHY by Peter A. Clarkson, Nalini Joshi & Marta Mazzocco Abstract. In this paper we give an algorithmic method of deriving the Lax
More informationIntroduction to Integrability
Introduction to Integrability Problem Sets ETH Zurich, HS16 Prof. N. Beisert, A. Garus c 2016 Niklas Beisert, ETH Zurich This document as well as its parts is protected by copyright. This work is licensed
More informationPeriodic and Soliton Solutions for a Generalized Two-Mode KdV-Burger s Type Equation
Contemporary Engineering Sciences Vol. 11 2018 no. 16 785-791 HIKARI Ltd www.m-hikari.com https://doi.org/10.12988/ces.2018.8267 Periodic and Soliton Solutions for a Generalized Two-Mode KdV-Burger s Type
More informationApplied Asymptotic Analysis
Applied Asymptotic Analysis Peter D. Miller Graduate Studies in Mathematics Volume 75 American Mathematical Society Providence, Rhode Island Preface xiii Part 1. Fundamentals Chapter 0. Themes of Asymptotic
More informationSpectral stability of periodic waves in dispersive models
in dispersive models Collaborators: Th. Gallay, E. Lombardi T. Kapitula, A. Scheel in dispersive models One-dimensional nonlinear waves Standing and travelling waves u(x ct) with c = 0 or c 0 periodic
More informationIntroduction LECTURE 1
LECTURE 1 Introduction The source of all great mathematics is the special case, the concrete example. It is frequent in mathematics that every instance of a concept of seemingly great generality is in
More informationon Associative Algebras , Ufa RUSSIA Abstract. This paper surveys the classication of integrable evolution equations
Integrable Evolution Equations on Associative Algebras Peter J. Olver y School of Mathematics University of Minnesota Minneapolis, MN 55455 U.S.A. olver@ima.umn.edu http://www.math.umn.edu/olver Vladimir
More informationUniversity of Bristol - Explore Bristol Research
Grava, T., Dubrovin, B., Klein, C., & Moro, A. 2015). On Critical Behaviour in Systems of Hamiltonian Partial Differential Equations. Journal of Nonlinear Science, 253), 631-707. DOI: 10.1007/s00332-015-9236-y
More informationThe elliptic sinh-gordon equation in the half plane
Available online at www.tjnsa.com J. Nonlinear Sci. Appl. 8 25), 63 73 Research Article The elliptic sinh-gordon equation in the half plane Guenbo Hwang Department of Mathematics, Daegu University, Gyeongsan
More informationPiecewise Smooth Solutions to the Burgers-Hilbert Equation
Piecewise Smooth Solutions to the Burgers-Hilbert Equation Alberto Bressan and Tianyou Zhang Department of Mathematics, Penn State University, University Park, Pa 68, USA e-mails: bressan@mathpsuedu, zhang
More informationSEMILINEAR ELLIPTIC EQUATIONS WITH DEPENDENCE ON THE GRADIENT
Electronic Journal of Differential Equations, Vol. 2012 (2012), No. 139, pp. 1 9. ISSN: 1072-6691. URL: http://ejde.math.txstate.edu or http://ejde.math.unt.edu ftp ejde.math.txstate.edu SEMILINEAR ELLIPTIC
More informationTravelling waves. Chapter 8. 1 Introduction
Chapter 8 Travelling waves 1 Introduction One of the cornerstones in the study of both linear and nonlinear PDEs is the wave propagation. A wave is a recognizable signal which is transferred from one part
More informationBuilding Generalized Lax Integrable KdV and MKdV Equations with Spatiotemporally Varying Coefficients
Journal of Physics: Conference Series OPEN ACCESS Building Generalized Lax Integrable KdV and MKdV Equations with Spatiotemporally Varying Coefficients To cite this article: M Russo and S R Choudhury 2014
More informationNumerical Methods for Modern Traffic Flow Models. Alexander Kurganov
Numerical Methods for Modern Traffic Flow Models Alexander Kurganov Tulane University Mathematics Department www.math.tulane.edu/ kurganov joint work with Pierre Degond, Université Paul Sabatier, Toulouse
More informationCoupled KdV Equations of Hirota-Satsuma Type
Journal of Nonlinear Mathematical Physics 1999, V.6, N 3, 255 262. Letter Coupled KdV Equations of Hirota-Satsuma Type S.Yu. SAKOVICH Institute of Physics, National Academy of Sciences, P.O. 72, Minsk,
More informationHamiltonian Dynamics
Hamiltonian Dynamics CDS 140b Joris Vankerschaver jv@caltech.edu CDS Feb. 10, 2009 Joris Vankerschaver (CDS) Hamiltonian Dynamics Feb. 10, 2009 1 / 31 Outline 1. Introductory concepts; 2. Poisson brackets;
More informationDispersion relations, stability and linearization
Dispersion relations, stability and linearization 1 Dispersion relations Suppose that u(x, t) is a function with domain { < x 0}, and it satisfies a linear, constant coefficient partial differential
More informationarxiv:nlin/ v1 [nlin.si] 27 Jul 2006
SELF-SIMILAR SOLUTIONS OF THE NON-STRICTLY HYPERBOLIC WHITHAM EQUATIONS V. U. PIERCE AND FEI-RAN TIAN arxiv:nlin/0607061v1 [nlin.si] 27 Jul 2006 Abstract. We study the Whitham equations for the fifth order
More informationAlgebraic structures related to integrable differential equations
SOCIEDADE BRASILEIRA DE MATEMÁTICA ENSAIOS MATEMÁTICOS 2017, Volume 31, 1 108 Algebraic structures related to integrable differential equations Vladimir Sokolov Abstract. This survey is devoted to algebraic
More information. OKAMOTO S SPACE FOR THE FIRST PAINLEVÉ EQUATION IN BOUTROUX COORDINATES J.J. DUISTERMAAT AND N. JOSHI
. OKAMOTO S SPACE FOR THE FIRST PAINLEVÉ EQUATION IN BOUTROUX COORDINATES J.J. DUISTERMAAT AND N. JOSHI Abstract. We study the completeness and connectedness of asymptotic behaviours of solutions of the
More informationLecture17: Generalized Solitary Waves
Lecture17: Generalized Solitary Waves Lecturer: Roger Grimshaw. Write-up: Andrew Stewart and Yiping Ma June 24, 2009 We have seen that solitary waves, either with a pulse -like profile or as the envelope
More informationThe first three (of infinitely many) conservation laws for (1) are (3) (4) D t (u) =D x (3u 2 + u 2x ); D t (u 2 )=D x (4u 3 u 2 x +2uu 2x ); D t (u 3
Invariants and Symmetries for Partial Differential Equations and Lattices Λ Ünal Göktaοs y Willy Hereman y Abstract Methods for the computation of invariants and symmetries of nonlinear evolution, wave,
More informationComplex Analysis Math 205A, Winter 2014 Final: Solutions
Part I: Short Questions Complex Analysis Math 205A, Winter 2014 Final: Solutions I.1 [5%] State the Cauchy-Riemann equations for a holomorphic function f(z) = u(x,y)+iv(x,y). The Cauchy-Riemann equations
More informationIntegrable dynamics of soliton gases
Integrable dynamics of soliton gases Gennady EL II Porto Meeting on Nonlinear Waves 2-22 June 213 Outline INTRODUCTION KINETIC EQUATION HYDRODYNAMIC REDUCTIONS CONCLUSIONS Motivation & Background Main
More informationarxiv: v2 [nlin.si] 9 Aug 2017
Whitham modulation theory for the Kadomtsev-Petviashvili equation Mark J. Ablowitz 1 Gino Biondini 23 and Qiao Wang 2 1 Department of Applied Mathematics University of Colorado Boulder CO 80303 2 Department
More informationLinear and nonlinear ODEs and middle convolution
Linear and nonlinear ODEs and middle convolution Galina Filipuk Institute of Mathematics University of Warsaw G.Filipuk@mimuw.edu.pl Collaborator: Y. Haraoka (Kumamoto University) 1 Plan of the Talk: Linear
More informationFinal Exam May 4, 2016
1 Math 425 / AMCS 525 Dr. DeTurck Final Exam May 4, 2016 You may use your book and notes on this exam. Show your work in the exam book. Work only the problems that correspond to the section that you prepared.
More informationDefinition 5.1. A vector field v on a manifold M is map M T M such that for all x M, v(x) T x M.
5 Vector fields Last updated: March 12, 2012. 5.1 Definition and general properties We first need to define what a vector field is. Definition 5.1. A vector field v on a manifold M is map M T M such that
More informationarxiv:nlin/ v1 [nlin.si] 17 Jun 2006
Integrable dispersionless KdV hierarchy with sources arxiv:nlin/0606047v [nlin.si] 7 Jun 2006 Zhihua Yang, Ting Xiao and Yunbo Zeng Department of Mathematical Sciences, Tsinghua University, Beijing 00084,
More informationNumerical Study of Oscillatory Regimes in the KP equation
Numerical Study of Oscillatory Regimes in the KP equation C. Klein, MPI for Mathematics in the Sciences, Leipzig, with C. Sparber, P. Markowich, Vienna, math-ph/"#"$"%& C. Sparber (generalized KP), personal-homepages.mis.mpg.de/klein/
More informationMultiple integrals: Sufficient conditions for a local minimum, Jacobi and Weierstrass-type conditions
Multiple integrals: Sufficient conditions for a local minimum, Jacobi and Weierstrass-type conditions March 6, 2013 Contents 1 Wea second variation 2 1.1 Formulas for variation........................
More informationStudies on Integrability for Nonlinear Dynamical Systems and its Applications
Studies on Integrability for Nonlinear Dynamical Systems and its Applications Koichi Kondo Division of Mathematical Science Department of Informatics and Mathematical Science Graduate School of Engineering
More informationKAM for NLS with harmonic potential
Université de Nantes 3rd Meeting of the GDR Quantum Dynamics MAPMO, Orléans, 2-4 February 2011. (Joint work with Benoît Grébert) Introduction The equation : We consider the nonlinear Schrödinger equation
More informationSurface x(u, v) and curve α(t) on it given by u(t) & v(t). Math 4140/5530: Differential Geometry
Surface x(u, v) and curve α(t) on it given by u(t) & v(t). α du dv (t) x u dt + x v dt Surface x(u, v) and curve α(t) on it given by u(t) & v(t). α du dv (t) x u dt + x v dt ( ds dt )2 Surface x(u, v)
More informationA uniqueness result for 2-soliton solutions of the KdV equation
A uniqueness result for 2-soliton solutions of the KdV equation John P. Albert Department of Mathematics, University of Oklahoma, Norman OK 73019, jalbert@ou.edu January 21, 2018 Abstract Multisoliton
More informationRogue periodic waves for mkdv and NLS equations
Rogue periodic waves for mkdv and NLS equations Jinbing Chen and Dmitry Pelinovsky Department of Mathematics, McMaster University, Hamilton, Ontario, Canada http://dmpeli.math.mcmaster.ca AMS Sectional
More informationA new integrable system: The interacting soliton of the BO
Phys. Lett., A 204, p.336-342, 1995 A new integrable system: The interacting soliton of the BO Benno Fuchssteiner and Thorsten Schulze Automath Institute University of Paderborn Paderborn & Germany Abstract
More informationEvolutionary Hirota Type (2+1)-Dimensional Equations: Lax Pairs, Recursion Operators and Bi-Hamiltonian Structures
Symmetry, Integrability and Geometry: Methods and Applications Evolutionary Hirota Type +-Dimensional Equations: Lax Pairs, Recursion Operators and Bi-Hamiltonian Structures Mikhail B. SHEFTEL and Devrim
More informationMATH 220: Problem Set 3 Solutions
MATH 220: Problem Set 3 Solutions Problem 1. Let ψ C() be given by: 0, x < 1, 1 + x, 1 < x < 0, ψ(x) = 1 x, 0 < x < 1, 0, x > 1, so that it verifies ψ 0, ψ(x) = 0 if x 1 and ψ(x)dx = 1. Consider (ψ j )
More informationTHE TODA LATTICE. T (y) = α(e βy 1)
THE TODA LATTICE Background The Toda lattice is named after Morikazu Toda, who discovered in the 1960 s that the differential equations for a lattice with internal force T (y) = α(e βy 1) (with α, β constant)
More informationMultisoliton Interaction of Perturbed Manakov System: Effects of External Potentials
Multisoliton Interaction of Perturbed Manakov System: Effects of External Potentials Michail D. Todorov Faculty of Applied Mathematics and Computer Science Technical University of Sofia, Bulgaria (Work
More informationStability of Feedback Solutions for Infinite Horizon Noncooperative Differential Games
Stability of Feedback Solutions for Infinite Horizon Noncooperative Differential Games Alberto Bressan ) and Khai T. Nguyen ) *) Department of Mathematics, Penn State University **) Department of Mathematics,
More informationTHEODORE VORONOV DIFFERENTIABLE MANIFOLDS. Fall Last updated: November 26, (Under construction.)
4 Vector fields Last updated: November 26, 2009. (Under construction.) 4.1 Tangent vectors as derivations After we have introduced topological notions, we can come back to analysis on manifolds. Let M
More informationGroup analysis, nonlinear self-adjointness, conservation laws, and soliton solutions for the mkdv systems
ISSN 139-5113 Nonlinear Analysis: Modelling Control, 017, Vol., No. 3, 334 346 https://doi.org/10.15388/na.017.3.4 Group analysis, nonlinear self-adjointness, conservation laws, soliton solutions for the
More informationConstruction of Conservation Laws: How the Direct Method Generalizes Noether s Theorem
Proceedings of 4th Workshop Group Analysis of Differential Equations & Integrability 2009, 1 23 Construction of Conservation Laws: How the Direct Method Generalizes Noether s Theorem George W. BLUMAN,
More informationThe Higher Dimensional Bateman Equation and Painlevé Analysis of Nonintegrable Wave Equations
Symmetry in Nonlinear Mathematical Physics 1997, V.1, 185 192. The Higher Dimensional Bateman Equation and Painlevé Analysis of Nonintegrable Wave Equations Norbert EULER, Ove LINDBLOM, Marianna EULER
More informationCLASSIFICATION AND PRINCIPLE OF SUPERPOSITION FOR SECOND ORDER LINEAR PDE
CLASSIFICATION AND PRINCIPLE OF SUPERPOSITION FOR SECOND ORDER LINEAR PDE 1. Linear Partial Differential Equations A partial differential equation (PDE) is an equation, for an unknown function u, that
More informationHOMOTOPY ANALYSIS METHOD FOR SOLVING KDV EQUATIONS
Surveys in Mathematics and its Applications ISSN 1842-6298 (electronic), 1843-7265 (print) Volume 5 (21), 89 98 HOMOTOPY ANALYSIS METHOD FOR SOLVING KDV EQUATIONS Hossein Jafari and M. A. Firoozjaee Abstract.
More informationCompatible Hamiltonian Operators for the Krichever-Novikov Equation
arxiv:705.04834v [math.ap] 3 May 207 Compatible Hamiltonian Operators for the Krichever-Novikov Equation Sylvain Carpentier* Abstract It has been proved by Sokolov that Krichever-Novikov equation s hierarchy
More informationA PERIODICITY PROBLEM FOR THE KORTEWEG DE VRIES AND STURM LIOUVILLE EQUATIONS. THEIR CONNECTION WITH ALGEBRAIC GEOMETRY
A PERIODICITY PROBLEM FOR THE KORTEWEG DE VRIES AND STURM LIOUVILLE EQUATIONS. THEIR CONNECTION WITH ALGEBRAIC GEOMETRY B. A. DUBROVIN AND S. P. NOVIKOV 1. As was shown in the remarkable communication
More informationDispersion in Shallow Water
Seattle University in collaboration with Harvey Segur University of Colorado at Boulder David George U.S. Geological Survey Diane Henderson Penn State University Outline I. Experiments II. St. Venant equations
More informationSymbolic Computation of Conservation Laws of Nonlinear Partial Differential Equations in Multiple Space Dimensions
Symbolic Computation of Conservation Laws of Nonlinear Partial Differential Equations in Multiple Space Dimensions Willy Hereman and Douglas Poole Department of Mathematical and Computer Sciences Colorado
More informationNumerical Algorithms as Dynamical Systems
A Study on Numerical Algorithms as Dynamical Systems Moody Chu North Carolina State University What This Study Is About? To recast many numerical algorithms as special dynamical systems, whence to derive
More informationInverse Lax-Wendroff Procedure for Numerical Boundary Conditions of. Conservation Laws 1. Abstract
Inverse Lax-Wendroff Procedure for Numerical Boundary Conditions of Conservation Laws Sirui Tan and Chi-Wang Shu 3 Abstract We develop a high order finite difference numerical boundary condition for solving
More informationPeriodic oscillations in the Gross-Pitaevskii equation with a parabolic potential
Periodic oscillations in the Gross-Pitaevskii equation with a parabolic potential Dmitry Pelinovsky 1 and Panos Kevrekidis 2 1 Department of Mathematics, McMaster University, Hamilton, Ontario, Canada
More informationBurgers equation in the complex plane. Govind Menon Division of Applied Mathematics Brown University
Burgers equation in the complex plane Govind Menon Division of Applied Mathematics Brown University What this talk contains Interesting instances of the appearance of Burgers equation in the complex plane
More informationSingularities, Algebraic entropy and Integrability of discrete Systems
Singularities, Algebraic entropy and Integrability of discrete Systems K.M. Tamizhmani Pondicherry University, India. Indo-French Program for Mathematics The Institute of Mathematical Sciences, Chennai-2016
More information