Perturbation of a stochastic web

The influence of a perturbation of the Hamiltonian on the process of the random walk of a particle in a phase space with a stochastic web is investigated. The bifurcations connected with such a perturbation are considered. The acceleration of the particle diffusion due to nonresonant perturbation and the transformation of the stochastic web to the strong anisotropic form for the resonant perturbation are shown.