Category: Free Online Math Materials

The Hypercube

By Andrew D. Hwang on July 7, 2025

The Hypercube allows us to explore shadows of a \(4\)-cube under rotations about coordinate planes…

By Andrew D. Hwang on July 6, 2025

Möbius Transformations helps visualize angle-preserving self-maps of the unit sphere in \(3\)-space. In Spring 2020,…

By Andrew D. Hwang on July 5, 2025

Torus Sketch is a simple, descriptively-named interactive program for drawing on a square torus. “Simple”…

By Andrew D. Hwang on July 3, 2025

Digitization of public domain ebooks at Distributed Proofreaders (DP) for Project Gutenberg (PG) involves collaboration…

By Andrew D. Hwang on July 2, 2025July 2, 2025

Theory of Finite Groups by William Burnside is among the most modern books I helped…