But why is a sphere's surface area four times its shadow
The Extended Complex Plane (Riemann Sphere)
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2D projection of a rotating 4D sphere
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Last Updated: October 22, 2026
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Summary
Relatively simple but really clever optics system shown at EPSC2017, for using a regular reddit.com/r/desmos/comments/ofjxnl/stereographic_projection_of_a_hypersphere/ ... Join the Discord: ... Visualizing the sphere and then the hyperbolic plane under various azimuthal projections (five of each). Making accurate world maps is mathematically impossible. Johnny on Instagram instagram.com/johnny.harris/ Help ... This is one of my favorite surplus finds, a In this video I show you how stereographic Featuring Hannah Fry.... Brilliant (and get 20% off their premium service): brilliant.org/numberphile (sponsor) ... The formula is no mere coincidence. Help fund future projects: patreon.com/3blue1brown An equally valuable form of ... This video introduces the extended complex plane, obtained by adjoining the symbol "infinity" to the complex plane. Then we ... Do you want to know more about dome