Abstract
In this paper, we prove an infinite dimensional KAM (Kolmogorov–Arnold–Moser) theorem, which can be used to the KdV equations
where \(\omega = \xi \bar \omega ,\,\,\bar \omega = (1,\alpha)\) is Liouvillean forced frequency and f is real analytic. We obtain a C∞ smooth response solution under zero mean-value periodic boundary conditions. The proof is based on a modified infinite dimensional KAM theory.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (No. 11971012). Yingnan Sun was supported by CSC (No. 202006190134).
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Chang, N., Geng, J. & Sun, Y. Response Solutions for KdV Equations with Liouvillean Frequency. Front. Math 18, 1083–1112 (2023). https://doi.org/10.1007/s11464-021-0099-2
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DOI: https://doi.org/10.1007/s11464-021-0099-2