二次微分系统的中心条件和通积分

叶惟寅;叶彦谦

On the Conditions of a Center and General Integrals of Quadratic Differential Systems

Wei Yin YE(1),Yan Qian YE(2)

数学学报 . 2003, (2): 309 -316 . DOI: 10.12386/A2003sxxb0040