Unique normal forms for the Takens–Bogdanov singularity in a special case
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Tài liệu tham khảo
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Chen G., Wang D., Wang X., Unique normal forms of nilpotent planar vector fields, Preprint, Université de Lille-1, 2000
Cushman, 1986, Nilpotent normal forms and representation theory of sl2(R), 56, 31
Elphick, 1987, A simple characterization for normal forms of singular vector fields, Physica D, 29, 95, 10.1016/0167-2789(87)90049-2
Kokubu, 1996, Linear grading function and further reduction of normal forms, J. Diff. Equations, 132, 293, 10.1006/jdeq.1996.0181