invariants

List of possible invairants to implement:

Alexander Polynomial Conway Polynomial Jones Polynomial HOMFLY-PT Polynomial Kauffman 2-variable Polynomial (F polynomial) Writhe Linking Number Seifert Genus (Upper Bound) Turaev Genus (more advanced but diagrammatic) Tricolorability n-Colorability (mod n coloring)

Modules

affine_index	Affine index polynomial for knotoids.
alexander(k[, symmetric])	Compute the one-variable Alexander polynomial via HOMFLY-PT specialization.
arrow	Arrow polynomial for knotoids (per Kauffman et al.).
bracket(k[, normalize])	Compute the Kauffman bracket polynomial ⟨·⟩.
cache	Lightweight LFU cache with an optional size cap.
classifier
coloring
conway(k)	Return the Alexander–Conway polynomial of a knot or link.
fundamental_group(k[, return_dict])	Return a presentation of the fundamental group of the complement of k in S³.
homflypt(k[, variables])	Compute the HOMFLY–PT polynomial.
jones(k)	Compute the Jones polynomial via the normalized Kauffman bracket.
kauffman(k)
mock_alexander	Mock Alexander-like polynomial (face-marking heuristic).
skein	Implementations of Skein operations.
tests
tutte	Tutte polynomial for planar graphs represented as PlanarDiagram objects.
unplugging(k)	Computes the "unplugging" invariant T.
writhe(k)	Return the writhe of k.
yamada(k[, normalize])	Return the Yamada polynomial of a given planar diagram.