- spherical tesselation
- мат. сферическая мозаика
Большой англо-русский и русско-английский словарь. 2001.
Большой англо-русский и русско-английский словарь. 2001.
Triangle group — In mathematics, a triangle group is a group that can be realized geometrically by sequences of reflections across the sides of a triangle. The triangle can be an ordinary Euclidean triangle, a triangle on the sphere, or a hyperbolic triangle.… … Wikipedia
Packing problem — Part of a series on Puzzles … Wikipedia