elementaryCollapse(Delta, F)
A free face of a simplicial complex $\Delta$ is a face that is a proper maximal subface of exactly one facet. The elementary collapse is the simplicial complex obtained by removing the free face, and the facet containing it, from $\Delta$. A simplicial complex that can be collapsed to a single vertex is called collapsible. Every collapsible simplicial complex is contractible, but the converse is not true.
|
|
|
|
|
|
|
|
The source of this document is in /build/reproducible-path/macaulay2-1.25.05+ds/M2/Macaulay2/packages/SimplicialComplexes/Documentation.m2:4552:0.