Tag Archives: immersed curves

Cube complexes, Reidemeister 3, zonohedra and the missing 8th region

There is an old puzzle which starts by asking: what is the next number in the sequence 1,2,4,? We are supposed to recognize the start of the sequence and answer that the next number is surely 8, because the first … Continue reading

Posted in 3-manifolds, Groups, Hyperbolic geometry, Polyhedra | Tagged , , , , | 1 Comment