By structure the bounded cubic systems in the plane, we prove that: 1) the system ( 1) have distribution of critical point with 5-4 ( 5 critical points with index+ 1 and 4 critical points with index-1), 3-2,2-1,+ 1;

  • 通过构造有界的平面三次系统,证实了(1)其有限奇点的5-4(5个奇点指标为+1,另4个奇点指标为-1)、3-2、2-1、+1四种分布均可实现;

  • 互联网摘选 2025-01-20 11:45:29

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