论文标题
宇宙学模型从几何观点
Cosmological models from a geometric point of view
论文作者
论文摘要
（没有原始摘要。）这些是1971年的暑期学校的讲义，该讲义尤其是当时已知的宇宙学模型，特别是比安奇宇宙学的特性，并对时空和正交四位化方法中的同态群体进行了教学介绍。
(There is no original abstract.) These are lecture notes from a 1971 summer school surveying the then known cosmological models in particular the properties of Bianchi cosmologies, and giving a pedagogical introduction to groups of isometries in spacetime and to the orthonormal tetrad method.
