almost periodic solutions
periodic soliton wave solutions
periodic solutions
多重周期解
周期解
周期响应
极限环
闭轨
Leray-Schauder不动点定理
中立型方程
periodic solutions for difference equations
periodic traveling wave solutions
periodic wave solutions
Positive almost periodic solutions
periodic double-soliton wave solutions
positive periodic solutions
pseudo almost periodic solutions
Sevarel periodic solutions
Triangle periodic solutions
triangular function periodic solutions
triangular periodic function solutions
triangular periodic solutions
periodic cosine wave solutions
periodic and almost periodic solutions
multiplicity periodic solutions
Almost positive periodic solutions