Hexaflexagon is a two-dimensional cousin of Kaleidocycle that turns to reveal different faces. This directory contains a paper model of a hexaflexagon with a world-map printed on it. Each portion of the world is mapped to a hexagon by preserving angles (that is, conformally) using the Schwarz-Christoffel mapping. It is designed by Lai Hsin-Yu and Kai-Hsiang Wang during NCTS Undergraduate Summer Research Program 2018.
- Paper model: Hexaflexagon with a conformally-printed world map.
- Long instruction: (in Japanese) A detailed instruction on how to fold.
- Short instruction: (in Japanese) A short version of above.