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Sponsored by the Center for Science and Technology Development of the Ministry of Education
Supervised by Ministry of Education of the People's Republic of China
In this paper we consider small perturbation of analytic non-twistarea preserving mappings, and prove the existence of invariantcurve by KAM iteration. As we know if the twist condition is not satisfied, the frequency of invariant curve may have some drift. But in this paper, we prove that the frequency of invariant curve persists without any drift.
Keywords:Invariant curve; Area preserving mapping; Non-twist condition; KAM iteration