| 第145行: |
第145行: |
| | =='''参考资料'''== | | =='''参考资料'''== |
| | <references /> | | <references /> |
| | + | |
| | + | == 外部链接 == |
| | + | * [http://www.scholarpedia.org/article/Equilibrium Scholarpedia: Equilibrium ] |
| | + | * [http://www.scholarpedia.org/article/Dynamical_systems Scholarpedia: Dynamical Systems] |
| | + | * [https://mathworld.wolfram.com/Center.html Wolfram MathWorld: Center ] |
| | + | * [https://en.wikipedia.org/wiki/Center_(mathematics) Wikipedia: Center (mathematics) ] |
| | {{DEFAULTSORT:非线性中心}} | | {{DEFAULTSORT:非线性中心}} |