House with two rooms or Bing's house is a particular contractible, 2-dimensional simplicial complex that is not collapsible. The name was given by R. H. Bing.[1]
The house is made of 2-dimensional panels, and has two rooms. The upper room may be entered from the bottom face, while the lower room may be entered from the upper face. There are two small panels attached to the tunnels between the rooms, which make this simplicial complex contractible.
See also
editExternal links
edit- Bing's house with two rooms at Info Shako
- A 3D model of Bing's house - the model can be visualized by using anaglyph glasses
- A printable 3D model of Bing's house at Thingverse
References
edit- ^ Bing, R. H., Some Aspects of the Topology of 3-Manifolds Related to the Poincaré Conjecture, Lectures on Modern Mathematics, Volume 2, 1964
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