欧氏几何: 第5公理 : 直线上过一点, 只有 n=1 条平行线
非欧几何:
- 罗氏: n >1 (空间)
- 黎曼: n = 0 (球体)
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Author: tomcircle
Math amateur View all posts by tomcircle
Mathtuition88 