www.neutreeko.net Neutreeko Publications and preprints D.Phil. thesis M.Sc. thesis Dissection puzzles Colouring the hex grid   Regular polyhedron surface tours   Cubic graphs of high girth   Some material on the game of Y   Non-colliding cars (based on hexastix) Stupid puzzle (just for fun) E-mail address: admin[at]neutreeko.net Last modified 09.04.2025 by Jan Kristian Haugland