This algorithm can be used to calculate not only intersection but also set-theoretic differences and union of two polygons .

该算法不仅可以求多边形的“交”，而且可以求多边形的“并”和“差”。

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When there is a positive measure on Boole algebra? This problem had more complete results, but they require some set-theoretic hypothesis usually.

布尔代数上何时存在正测度的问题，虽已有相对完整的结果，但多附有一些集论的假设条件。

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In particular, the thesis points out that the third method to show that all monomial space curves are set-theoretic complete intersections, thus simplifying the process to come to this conclusion.

特别的，文中给出了证明单项式空间曲线都是集合论完全交的第三种方法，从而简化了这一结论的证明过程。

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