Linear-order Species

sage.combinat.species.linear_order_species.LinearOrderSpecies(*args, **kwds)

Returns the species of linear orders.

EXAMPLES:

sage: L = species.LinearOrderSpecies()
sage: L.generating_series().coefficients(5)
[1, 1, 1, 1, 1]

class sage.combinat.species.linear_order_species.LinearOrderSpeciesStructure(parent, labels, list)

Bases: sage.combinat.species.structure.GenericSpeciesStructure

automorphism_group()

Returns the group of permutations whose action on this structure leave it fixed. For the species of linear orders, there is no non-trivial automorphism.

EXAMPLES:

sage: F = species.LinearOrderSpecies()
sage: a = F.structures(["a", "b", "c"]).random_element(); a
['a', 'b', 'c']
sage: a.automorphism_group()
Symmetric group of order 1! as a permutation group

canonical_label()

EXAMPLES:

sage: P = species.LinearOrderSpecies()
sage: s = P.structures(["a", "b", "c"]).random_element()
sage: s.canonical_label()
['a', 'b', 'c']

transport(perm)

Returns the transport of this structure along the permutation perm.

EXAMPLES:

sage: F = species.LinearOrderSpecies()
sage: a = F.structures(["a", "b", "c"]).random_element(); a
['a', 'b', 'c']
sage: p = PermutationGroupElement((1,2))
sage: a.transport(p)
['b', 'a', 'c']

class sage.combinat.species.linear_order_species.LinearOrderSpecies_class(min=None, max=None, weight=None)

Bases: sage.combinat.species.species.GenericCombinatorialSpecies