# SageMath code for working with abstract group 486.260. # Some of these functions may take a long time to execute (this depends on the group). # Construction of abstract group: G = PermutationGroup(['(2,3)(5,6)(8,9)(11,12)(14,15)', '(1,2,3)(4,5,6)(7,8,9)(10,11,12)', '(1,3,2)(4,5,6)', '(10,11,12)(13,14,15)', '(10,11,12)(13,15,14)', '(4,5,6)(10,11,12)']) # Order of the group: G.order() # Exponent of the group: G.exponent() # Automorphism group: libgap(G).AutomorphismGroup() # Composition factors of the group: G.composition_series() # Nilpotency class of the group: libgap(G).NilpotencyClassOfGroup() if G.is_nilpotent() else -1 # Derived length of the group: libgap(G).DerivedLength() # Determine if the group G is abelian: G.is_abelian() # Determine if the group G is cyclic: G.is_cyclic() # Determine if the group G is elementary abelian: G.is_elementary_abelian() # Determine if the group G is nilpotent: G.is_nilpotent() # Determine if the group G is perfect: G.is_perfect() # Determine if the group G is a p-group: G.is_pgroup() # Determine if the group G is polycyclic: G.is_polycyclic() # Determine if the group G is simple: G.is_simple() # Determine if the group G is solvable: G.is_solvable() # Determine if the group G is supersolvable: G.is_supersolvable() # Compute statistics for the group G: # Sage code to output the first two rows of the group statistics table element_orders = [g.order() for g in G] orders = sorted(list(set(element_orders))) print("Orders:", orders) print("Elements:", [element_orders.count(n) for n in orders], G.order()) cc_orders = [cc[0].order() for cc in G.conjugacy_classes()] print("Conjugacy classes:", [cc_orders.count(n) for n in orders], len(cc_orders)) # List of conjugacy classes of the group: G.conjugacy_classes() # Output not guaranteed to exactly match the LMFDB table # Compute statistics about the characters of G: # Outputs [[d_1,c_1], [d_2,c_2], ...] where c_i is the number of irr. complex chars. of G with degree d_i character_degrees = [c[0] for c in G.character_table()] [[n, character_degrees.count(n)] for n in set(character_degrees)] # Define the group with the given generators and relations: # This uses Sage's interface to GAP, as Sage (currently) has no native support for PC groups GPC = gap.new('PcGroupCode(3767160318631933983,486)'); a = GPC.1; b = GPC.2; c = GPC.3; d = GPC.4; e = GPC.5; f = GPC.6; # Define the group as a permutation group: PermutationGroup(['(2,3)(5,6)(8,9)(11,12)(14,15)', '(1,2,3)(4,5,6)(7,8,9)(10,11,12)', '(1,3,2)(4,5,6)', '(10,11,12)(13,14,15)', '(10,11,12)(13,15,14)', '(4,5,6)(10,11,12)']) # Define the group as a matrix group with coefficients in GLFq: F = GF(243); al = F.0; MS = MatrixSpace(F, 2, 2) MatrixGroup([MS([[al^206, al^147], [al^126, al^92]]), MS([[al^203, al^134], [al^113, al^40]]), MS([[al^189, al^196], [al^175, al^241]]), MS([[al^121, 0], [al^171, 1]]), MS([[al^95, al^82], [al^61, al^115]]), MS([[al^10, al^20], [al^241, al^88]])]) # The abelianization of the group: G.quotient(G.commutator()) # The Schur multiplier of the group: G.homology(2) # List of subgroups of the group: G.subgroups() # Center of the group: G.center() # Commutator subgroup of the group G: G.commutator() # Frattini subgroup of the group G: G.frattini_subgroup() # Fitting subgroup of the group G: G.fitting_subgroup() # Socle of the group G: G.socle() # Derived series of the group G: G.derived_series() # Chief series of the group G: libgap(G).ChiefSeries() # The lower central series of the group G: G.lower_central_series() # The upper central series of the group G: G.upper_central_series() # Character table: G.character_table() # Output not guaranteed to exactly match the LMFDB table