This spherical chalkboard my professor uses to teach curvature in General Relativity

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image showing This spherical chalkboard my professor uses to teach curvature in General Relativity

KingBoomOP on February 21st, 2020 at 15:51 UTC »

I am going to borrow that idea for my class

open_door_policy on February 21st, 2020 at 16:26 UTC »

These damned modern physicists and their non-Cartesian blackboards.

4a4a on February 21st, 2020 at 16:39 UTC »

Now if only someone could make a hypersphere-shaped chalkboard.