Abstract
The dynamics of an analytic reversible vector field \(V\)(X,μ) is studied in \(\mathbb{R}^4 \) with one real parameter μ close to 0; X=0 is a fixed point. The differential Dx \(V\)(0,0) generates an “oscillatory” dynamics with a frequency of order 1—due to two simple, opposite eigenvalues lying on the imaginary axis—and it also generates a “slow” dynamics which changes from a hyperbolic type—eigenvalues are \( \pm \sqrt { - \mu } \)—to an elliptic type—eigenvalues are \( \pm {\text{ }}i{\text{ }}\sqrt \mu \)—as μ passes trough 0. The existence of reversible homoclinic connections to periodic orbits is known for such vector fields. In this paper we study a particular subclass of such vector fields, obtained by small reversible perturbations of the normal form. We give an explicit condition on the perturbation, generically satisfied, which prevents the existence of a homoclinic connections to 0 for the perturbed system. The normal form system of any order admits a reversible homoclinic connection to 0, which then does not survive under perturbation of higher order. It will be seen that normal form essentially decouples the hyperbolic and elliptic part of the linearization to any chosen algebraic order. However, this decoupling does not persist arbitrary reversible perturbation, which finally causes the appearance of small amplitude oscillations.
Similar content being viewed by others
REFERENCES
Amick, C. J., and Kirchgässner K. (1989). A theory of solitary-waves in the presence of surface tension. Arch. Rat. Mech. Anal. 105, 1–49.
Amick, C. J., and McLeod, J. B. (1992). A singular perturbation problem in water waves. Stab. Appl. Anal. Cont. Media, 127–148.
Delshams, A., and Seara, T. M. (1992). An asymptotic expression for the splitting of separatrices of rapidly forced pendulum. Commun. Math. Phys. 150, 433–463.
Eckhaus, W. (1992). Singular perturbations of homoclinic orbits in ℝ4. SIAM J. Math. Anal. 23(5), 1269–1290.
Hammersley, G., and Mazzarino, J. M. (1989). Coputational aspects of some autonomous differential equations. Proc. Roy. Soc. London Ser A 424, 19–37.
Holmes, P., Marsden, J., and Scheurle, J. (1988). Exponentially small splittings of separatrices with applications to KAM theory and degenerate bifurcations. Contemp. Math. 81, 213–244.
Iooss, G., and Kirchgässner, K. (1992). Water waves for small surface tension: An approach via normal form. Proc. Roy. Soc. Edinburgh 122A, 267–299.
Lombardi, E. (1994a). Homoclinic orbits to exponentially small periodic orbits for a class of reversible systems. Proc. Roy. Soc. Edinburgh 126A, 1035–1054.
Lombardi, E. (1994b). Homoclinic orbits to exponentially small periodic orbits for a class of reversible systems. Application to water waves. Arch. Rational Mech. Anal. 137, 227–304.
Sauzin, D. (1994). Résurgence paramétrique et exponentielle petitesses de l'écart des séparatrices du pendule rapidement forcé. Thèse de doctorat, Univ. Paris 7.
Yang, T. S., and Akylas, T. R. (1995). Weakly nonlocal gravity-capillary solitary waves. Phys. Fluids 8(6), 1506–1514.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Lombardi, E. Non-persistence of Homoclinic Connections for Perturbed Integrable Reversible Systems. Journal of Dynamics and Differential Equations 11, 129–208 (1999). https://doi.org/10.1023/A:1021893602144
Issue Date:
DOI: https://doi.org/10.1023/A:1021893602144