This is a visualization of what happens when Pappus's theorem is iterated. Pappus's theorem is a basic theorem in projective geometry, going back to Pappus of Alexandria, an ancient Greek mathematician. The image illustrates the research in the paper Pappus's Theorem and the Modular Group, I.H.E.S. Publications Mathematiques , Vol. 78 pp. 187-206, by Richard Evan Schwartz. Credit: Rich Schwartz. Courtesy: National Science Foundation.
Plasma Ball Physics
A plasma ball is fun, but plasmas are an important part of our physical universe. From lightning to stars to the Northern Lights, plasmas are all around us.