问题

Questions in category: 基本群 (Fundamental Group).

$\pi_1(\mathbb{R}P^n)=\mathbf{Z}_2$, $n\geqslant 2$.

Posted by haifeng on 2012-07-20 15:22:53 last update 2012-07-20 15:22:53 | Answers (1) | 收藏

$\pi_1(\mathbb{R}P^n)=\mathbf{Z}_2$, $n\geqslant 2$.