Title: The Prelle-Singer method and Painlevé hierarchies

We consider systems of ordinary differential equations (ODEs) of the form BK=0, where B is a Hamiltonian operator of a completely integrable partial differential equation hierarchy, and K = (K, L){sup T}. Such systems, while of quite low order and linear in the components of K, may represent higher-order nonlinear systems if we make a choice of K in terms of the coefficient functions of B. Indeed, our original motivation for the study of such systems was their appearance in the study of Painlevé hierarchies, where the question of the reduction of order is of great importance. However, here we do not consider such particular cases; instead we study such systems for arbitrary K, where they may represent both integrable and nonintegrable systems of ordinary differential equations. We consider the application of the Prelle-Singer (PS) method—a method used to find first integrals—to such systems in order to reduce their order. We consider the cases of coupled second order ODEs and coupled third order ODEs, as well as the special case of a scalar third order ODE; for the case of coupled third order ODEs, the development of the PS method presented here is new. We apply the PS method tomore » examples of such systems, based on dispersive water wave, Ito and Korteweg-de Vries Hamiltonian structures, and show that first integrals can be obtained. It is important to remember that the equations in question may represent sequences of systems of increasing order. We thus see that the PS method is a further technique which we expect to be useful in our future work.« less

Departamento de Matemática Aplicada, Universidad Rey Juan Carlos, C/ Tulipán s/n, 28933 Móstoles, Madrid (Spain)

Centre for Nonlinear Dynamics, School of Physics, Bharathidasan University, Tiruchirapalli - 620 024 (India)

Publication Date:

OSTI Identifier:

22250601

Resource Type:

Journal Article

Resource Relation:

Journal Name: Journal of Mathematical Physics; Journal Volume: 55; Journal Issue: 5; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)

Country of Publication:

United States

Language:

English

Subject:

71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; FUNCTIONS; HAMILTONIANS; INTEGRAL CALCULUS; INTEGRALS; NONLINEAR PROBLEMS; PARTIAL DIFFERENTIAL EQUATIONS; WATER WAVES