pub fn cycle_index(
degree: usize,
gens: &[Perm],
cap: usize,
) -> Option<BTreeMap<Vec<usize>, u128>>Expand description
The cycle index data — the distribution of cycle types over the group, mapping each cycle type to
the number of elements with it. Dividing by |G| gives the cycle index polynomial, the engine of Pólya
enumeration. None when |G| > cap.