For inspecting topological and geometrical unanimity of a solid model, principle of closed path topology and Euler′s formula are important tools.
闭路拓扑原理和欧拉公式是检验实体模型边界表示的拓扑与几何一致性的重要工具。
2
The connectedness of the non-empty closed subsets hyperspace with locally finite topology is discussed and a cardinal function called discrete degree is introduced.