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| THE POINCAR BIFURCATION OF CUBIC HAMILTONIAN SYSTEMS WITH DOUBLE CENTERS | |
| 作者姓名： | Liu Tiecheng Song Yan |
| 作者单位： | Dept. of Math.，Bohai University，Jinzhou 121000 |
| 摘 要： | In this paper, we discuss the Poincare bifurcation of cubic Hamiltonian systems with double centers and prove that the systems may at least generate two limit cycles and at most generate three limit cycles outside the lemniscate after a small cubic perturbation. |
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