摘要
指出了文 [1 ]中引理的不足 。
The defect of lemma in reference\ was pointed out and the sufficie nt conditions which guarantee the nonexistence of limit cycles for planar autonomous system were derived.\;
出处
《山东工程学院学报》
CAS
2001年第2期35-36,共2页
Journal of Shandong Institute of Technology