具有Z2-等变性质的平面七次哈密顿向量场的相图分类（Ⅳ）

摘要

本文给出了一类新的具有Z2-等变性质的七次平面哈密顿向量场的全局相图，并对参数空间进行了划分。%In this paper, by the means of qualitative analysis of differential equations, nineteen new phase por-traits of a planar Hamiltonian vector field of degree 7 with Z2 -equivariant property are given and the parameter space is classified.