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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 provide a real analytic and complexvalued area preserving map, that possesses a divergent Birkhoffnormal form near an elliptic fixed point. The method uses the smalldivisor theory and the work of Gong in the study of the Halmitoniansystem.
Keywords:Several complex variables; normal form; area-preserving maps