O175.12
利用环域定理得到一类非线性微分方程极限环存在的充分条件,去掉了过去结论中的某些限制条件,推广了文献[1]的定理1.
The existence of limit cycles for the nonlinear oscillation equation is discussed, in which some hypothesis is omitted. The results of theorem 1 generalized the corresponding results for\.
张谋,魏曙光.一类非线性微分方程极限环的存在性[J].重庆大学学报,2004,27(8):136-138.