158KiB, 1200x882, 1200px-Stereographic_projection_in_3D.svg.png View SameGoogleiqdbSauceNAO Anonymous Mon 01 Jun 12:17:06 2020 No.11752121 ViewReplyOriginalReport Quoted By: >>11752128 So after Euclidian and Riemannian geometry, what's the next level of geometry for physics?