Coloring connections with counting mountain-valley assignments

Geometric and Arithmetic Relations Concerning Origami Jordi Guàrdia and Eulàlia Tramuns 35 Abelian and Non-Abelian Numbers via 3D Origami José Ignacio Royo Prieto and Eulàlia Tramuns 45 Interactive Construction and Automated Proof in Eos System with Application to Knot Fold of Regular Polygons Fadoua Ghourabi, Tetsuo Ida, and Kazuko Takahashi 55 Equal Division on Any Polygon Side by Folding Sy Chen 67 A Survey and Recent Results about Common Developments of Two or More Boxes Ryuhei Uehara 77 Unfolding Simple Folds from Crease Patterns Hugo A. Akitaya, Jun Mitani, Yoshihiro Kanamori, and Yukio Fukui 85