graph_square_hamiltonian (231B)
1 # Graph square hamiltonian 2 3 An [undirected_graph] whose [graph_square] is a [Hamiltonian_graph] 4 5 The [recognition_problem] is [NP_hard], cf [underground1978graphs] 6 7 Up: [graph_square] 8 9 See also: [graph_square_hamiltonian_variants]