Higher-order Abel equations: Lagrangian formalism, first integrals and Darboux polynomials

Details Higher-order Abel equations: Lagrangian formalism, first integrals and Darboux polynomials Higher-order Abel equations: Lagrangian formalism, first integrals and Darboux polynomials

2009-12-15

arxiv.org/abs/0912.2842v1

Nonlinearity 22 (2009) 2953-2969

Physics

Mathematical Physics

Scientific paper

A geometric approach is used to study a family of higher-order nonlinear Abel equations. The inverse problem of the Lagrangian dynamics is studied in the particular case of the second-order Abel equation and the existence of two alternative Lagrangian formulations is proved, both Lagrangians being of a non-natural class (neither potential nor kinetic term). These higher-order Abel equations are studied by means of their Darboux polynomials and Jacobi multipliers. In all the cases a family of constants of the motion is explicitly obtained. The general n-dimensional case is also studied.

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