Unstable Manifold of Hénon Map

Abstract

A new algorithm is presented for computing one dimensional unstable manifold of a map and Henon map is taken as an example to test the performance of the algorithm. The unstable manifold is grown with new point added at each step and the distance between consecutive points is adjusted according to the local curvature. It is proved that the gradient of the manifold at the new point can be predicted by the known points on the manifold and in this way the preimage of the new point could be located immediately. During the simulation, it is found that the unstable manifold of Henon map coincides with its direct iteration when canonical parameters are chosen which means order is obtained out of chaos. In the other several groups of parameters the two branches of the unstable manifolds are nearly symmetric, and they serve as the borderline of the Henon map iteration sequence. We hope that this would contribute to the further exploration of Henon map. DOI : http://dx.doi.org/10.11591/telkomnika.v12i2.4328