SimplexTree.collapse

SimplexTree.SimplexTree.collapse(sigma, tau)

Performs an elementary collapse on two given simplices.

Checks whether its possible to collapse \sigma through \tau, and if so, both simplices are removed. A simplex \sigma is said to be collapsible through one of its faces \tau if \sigma is the only coface of \tau (excluding \tau itself).

Parameters

Name	Type	Description	Default
sigma	Collection	maximal simplex to collapse	required
tau	Collection	face of sigma to collapse	required

Returns

Name	Type	Description
	bool	whether the pair was collapsed

Examples

from simplextree import SimplexTree
st = SimplexTree([[0,1,2]])
print(st)

Simplex Tree with (3, 3, 1) (0, 1, 2)-simplices

st.collapse([0,1,2], [1,2])
print(st)

Simplex Tree with (3, 2) (0, 1)-simplices