House with two rooms
Encyclopedia
House with two rooms or Bing's house is a particular contractible 2-complex
that is not collapsible
.
The name was given by R. H. Bing.
Simplicial complex
In mathematics, a simplicial complex is a topological space of a certain kind, constructed by "gluing together" points, line segments, triangles, and their n-dimensional counterparts...
that is not collapsible
Collapse (topology)
In topology, a branch of mathematics, collapse is a concept due to J. H. C. Whitehead.- Definition :Let K be a simplicial complex, and suppose that s is a simplex in K. We say that s has a free face t if t is a face of s and t has no other cofaces. We call a free pair...
.
The name was given by R. H. Bing.