-
1.The topological groupoid of a surfaceis the set of all points on thesurface that are not collinear.
一个表面的拓扑群丛是表面所有不共线的点的集合。
-
2. In topological groupoidtheory, the fundamental problem is to finda way to represent the structure of aspace in terms of its topology.
在拓扑群丛理论中，基本问题是找到一种方法，用空间的拓扑来表示其结构。
-
3. Topological groupoids have been used to study the propertiesof different types of spaces, such asmanifolds and hyperbolic spaces.
拓扑群丛已被用来研究不同类型空间的性质，如流形和双曲空间。