摘要
本文利用度理论研究高阶Duffing方程周期解的存在性,在某种程度上改进 了一些已有的结果.
In this paper, the existence of periodic solutions for high order Duffing equations is studied by using degree theory and some known results are improved to some extent.
出处
《数学学报(中文版)》
SCIE
CSCD
北大核心
2003年第1期49-56,共8页
Acta Mathematica Sinica:Chinese Series