petls.sheaf_simplex_tree

class petls.sheaf_simplex_tree(_st: gudhi.simplex_tree, _extra_data: dict, _restriction: Callable[[list[int], list[int], sheaf_simplex_tree], float])

Wrap a Gudhi simplex tree with possibly added data and a given restriction function.

Attributes:

stgudhi.simplex_tree

Underlying simplex tree

extra_datadict

Keys are simplices (list of int) converted to tuples, e.g. tuple([0,1,2]). Values can be anything.

restrictionCallable[[list[int], list[int], ‘sheaf_simplex_tree’], float]

Restriction function from a simplex to a coface, which may need knowledge from the whole sheaf_simplex_tree. e.g. my_restriction(simplex, coface, sst)

complex_dimint

Dimension of the complex, same as dimension of the simplex tree

Methods

coface_index(simplex, coface):	Get the index of the missing vertex, e.g. coface_index([0,1,3],[0,1,2,3]) = 2.
apply_restriction_function():	Get coboundaries and filtrations

__init__(_st: gudhi.simplex_tree, _extra_data: dict, _restriction: Callable[[list[int], list[int], sheaf_simplex_tree], float])

Methods

__init__(_st, _extra_data, _restriction)
apply_restriction_function()	Get coboundaries and filtrations
coface_index(simplex, coface)	Get the index of the missing vertex, e.g. coface_index([0,1,3],[0,1,2,3]) = 2.
reindex_coboundaries(coboundaries_triples)