by Greg Egan If you link to this page, please use this URL: https://www.gregegan.net/SCIENCE/PSP/PSP.html Symmetries and the 24-cell | Average Shadows | Ball Bearings in a Hypersphere | Black Hole Passing | Born Rigid Motion | Catacaustics | Resonant Modes of a Conical Cavity | The Doppler Shift Triangle Law | Conic Section Orbits |
