Links

Things that you may find entertaining or useful:

• Pdf file of Oleg Viro's talk in Toronto conference "Legacy of Vladimir Arnold". Warning: do not print! Only for screen viewing!
• Oleg Viro, Biflippers and head to tail composition rules
• Oleg Viro, Defining relations for reflections. I
• Wikipedia, Non-Euclidean geometry
• Wikipedia, Symmetric space
• Wikipedia, Homogeneous space
• Wikipedia, Erlangen program