接近3∶1共振Poincaré映射扰动Hamilton向量场的全局分枝（Ⅱ）

Global Bihfurcations in a Disturbed Hamiltonian Vector Field Approaching Resonant Poincar Map(Ⅱ)

本文继续研究接近３：１共振映射扰动Ｈａｍｉｌｔｏｎ向量场，用新的方法讨论了当参数满足条件ａ＞０，４ａｂ＝１时扰动向量场的分枝情况。

In this paper,we continuously study global bifarcations in a disturbedHamiltonian vector fleld approaching a Poincar map in the resonant case. We use a newmethod to study bifurctions of(1)_ε,when parameters satisfy condition a >0, 4ab=1.