SimplexTree.expand

SimplexTree.SimplexTree.expand(k, f=None)

Performs a k-expansion of the complex.

This function is particularly useful for expanding clique complexes beyond their 1-skeleton.

Parameters

Name	Type	Description	Default
k	int	maximum dimension to expand to.	required
f	Optional[Callable[[Collection], bool]]	boolean predicate which returns whether a simplex should added to the complex (and further expanded).	`None`

from simplextree import SimplexTree
from itertools import combinations
st = SimplexTree(combinations(range(8), 2))
print(st)

Simplex Tree with (8, 28) (0, 1)-simplices

st.expand(2, lambda s: 2 in s)  # Expand only triangles containing 2 as a vertex
print(st)

Simplex Tree with (8, 28, 21) (0, 1, 2)-simplices

st.expand(2) # Expand all 2-cliques
print(st)

Simplex Tree with (8, 28, 56) (0, 1, 2)-simplices