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Nelineinaya Dinamika [Russian Journal of Nonlinear Dynamics], 2013, Volume 9, Number 3, Pages 459–478
(Mi nd400)
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This article is cited in 1 scientific paper (total in 1 paper)
Notes on integrable systems
Valery V. Kozlov Steklov Mathematical Institute of the Russian Academy of Sciences, Gubkina st. 8, Moscow, 119991, Russia
Abstract:
The problem of integrability conditions for systems of differential equations is discussed. Darboux's classical results on the integrability of linear non-autonomous systems with an incomplete set of particular solutions are generalized. Special attention is paid to linear Hamiltonian systems. The paper discusses the general problem of integrability of the systems of autonomous differential equations in an $n$-dimensional space which permit the algebra of symmetry fields of dimension $\ge n$. Using a method due to Liouville, this problem is reduced to investigating the integrability conditions for Hamiltonian systems with Hamiltonians linear in the momentums in phase space of dimension that is twice as large. In conclusion, the integrability of an autonomous system in three-dimensional space with two independent non-trivial symmetry fields is proved. It should be emphasized that no additional conditions are imposed on these fields.
Keywords:
integrability by quadratures, adjoint system, Hamilton equations, Euler–Jacobi theorem, Lie theorem, symmetries.
Received: 02.09.2013 Revised: 23.09.2013
Citation:
Valery V. Kozlov, “Notes on integrable systems”, Nelin. Dinam., 9:3 (2013), 459–478
Linking options:
https://www.mathnet.ru/eng/nd400 https://www.mathnet.ru/eng/nd/v9/i3/p459
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