The boundedness of all the solutions for semilinear Duffing equation x″+ω~2x+φ(x)=p(t),ω∈R^+\(?) is proved, where p(t) is a smooth 2π-periodic function and the perturbation φ(x) is
基金Project supported by the National Natural Science Foundation of China (Grant No. 19731003).
文摘The boundedness of all the solutions for semilinear Duffing equation x″+ω~2x+φ(x)=p(t),ω∈R^+\(?) is proved, where p(t) is a smooth 2π-periodic function and the perturbation φ(x) is