ABSTRACT We provide normal forms and the global phase portraits on the Poincaré disk of the Abel quadratic differential equations of the second kind having a symmetry with respect to an axis or to the origin. Moreover, we also provide the bifurcation diagrams for these global phase portraits.

中文翻译：

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具有对称性的第二类阿贝尔二次微分系统的相图

摘要 我们提供关于轴或原点对称的第二类阿贝尔二次微分方程的庞加莱圆盘上的范式和全局相图。此外，我们还提供了这些全局相图的分叉图。