Whitehead manifold (source code)

= Whitehead manifold
{wiki=Whitehead_manifold}

The Whitehead manifold is an example of a specific type of 3-manifold that is notable in the field of topology. It is particularly interesting because it is an example of a non-trivial manifold that is "homotopy equivalent" to a 3-sphere but is not homeomorphic to any standard manifold.