GoKawiilBlog post explores mathematical billiards through custom software experiments
Lael Shelton Costa published an explainer on mathematical billiards, a field where balls bounce endlessly and frictionlessly inside convex shapes like ellipses. The post introduces 'inner billiards,' showing how a ball struck between two boundary points traces a trajectory of chords as it reflects off the walls. Costa illustrates the concept using Geogebra diagrams and a custom-built visualization tool hosted on their personal website.