通过对欧氏第五公设的试证，引入罗氏几何与黎氏几何。

We introduce the Lobachevskian geometry and the Ricmanian geometry by proving the Euclidean of the fifth postulate.

youdao

通过对欧氏第五公设的试证，引入罗氏几何与黎氏几何。

We introduce the Lobachevskian geometry and the Ricmanian geometry by proving the Euclidean of the fifth postulate.

youdao