研究了在Einstein流形上存在某种非平凡Killing向量场的必要条件;同时给出了两个例子:1)标准球S6上的基本向量场;2)S^2×S^3上的单位Killing向量场.
The necessary conditions of the existence of some nontrival Killing vector field on Einstein manifolds are investigated,and two examples are given.