The International Mathematical Olympiad (IMO) is a prestigious competition featuring talented high school students from around the world, in which competitors solve complicated mathematical problems.

3D isometric cubes for each shape using the dotted lines on a dots grid. The line drawing is on a school math sheet with a white background. Royalty-free licenses let you pay once to use copyrighted ...

Crystallographic groups are groups which act in a nice way and via isometries on some n-dimensional Euclidean space. They got their name, because in three dimensions they occur as the symmetry groups ...