Keywords: Hyperbolic 642 subgroups-small.png Hyperbolic symmetry reflective subgroups of 642 Self 1/7/13 Tom Ruen Uniform dual tiling V 4-8-12 Uniform dual tiling V 6-8-8 Uniform dual tiling V 4-4-4-6 Uniform dual tiling V 4-12-12 Order-4 hexagonal tiling Uniform dual tiling V 4-6-4-6 Order-6 square tiling English text |