Browsing by Author "Ding, Tongren"

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    Boundedness of Solutions of Duffing's Equation
    (1984) Ding, Tongren
    J. Littlewood, L. Markus, and J. Moser proposed independently the boundedness problem for solutions of Duffing's equation: x+g(x)=p(t), where p(t) is continuous and periodic and g(x) is superlinear at infinity. The purpose of this paper is to prove that all solutions of the above-mentioned Duffing's equation are bounded for tR when p(t) is even (or when p(t) is odd and g(x) is odd).