Abstract
The main purpose of this paper is to investigate the existence of almost periodic solutions for the Duffing differential equation. By combining the theory of exponential dichotomies with Liapunov functions, we obtain an intersting result on the existence of almost periodic solutions.
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This work is supported by NSF of China, No.19401013
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Weiyao, Z. Almost periodic solutions for nonlinear duffing equations. Acta Mathematica Sinica 13, 373–380 (1997). https://doi.org/10.1007/BF02560018
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DOI: https://doi.org/10.1007/BF02560018