Crumpled_cubes

Crumpled cube

In geometric topology, a branch of mathematics, a crumpled cube is any space in R3 homeomorphic to a 2-sphere together with its interior.[1] Lininger showed in 1965 that the union of a crumpled cube and an open 3-ball glued along their boundaries is a 3-sphere.[2]


References

  1. Martin, Joseph (1966). "The sum of two crumpled cubes". Michigan Mathematical Journal. 13 (2): 147–151. doi:10.1307/mmj/1028999538. Open access icon



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