用球极投影可视化四元数

3Blue1Brown builds visual intuition for quaternions, showing how to think about this four-dimensional number system using stereographic projection and rotations in 3D space. It is part one of a two-part series with an interactive companion site.

Why HN likes it: HN commenters recommend it as the best visual explanation of quaternions and a good way to visualize higher dimensions.

“He does a great job of explaining quaternions though visual intuition.”