yashenko meaning in Chinese

亚申科

In this paper we will prove that quadratic system has at most finitely limit cycles . bamon claimed that he had finished the demonstration of the finiteness of limit cycles , but he used il ' yashenko theorem , which involves some knowledge of complex domain , so it is the main idea to give il ' yashenko theorem an elementary proof in this paper
本文将用纯初等方法研究二次系统极限环的有限性，虽然bamon宣布已经完成了二次系统极限环的有限性证明，但其证明过程中用到了涉及复域的il ' yashenko定理，从而给il ' yashenko定理一个初等的证明是本文的主要思想。