We classify webs of minimal degree rational curves on surfaces and give a criterion for webs being hexagonal. In addition, we classify Neron–Severi lattices of real weak del Pezzo surfaces. These two classifications are related to root subsystems of E8.

中文翻译：

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真实曲面上的有理曲线网和真实弱del Pezzo曲面的分类

我们对表面上最小度有理曲线的腹板进行分类，并给出腹板为六边形的标准。另外，我们对真正的弱del Pezzo曲面的Neron–Severi晶格进行分类。这两个分类与E8的根子系统有关。