Positive integers 8 Cycles 4 Following problem 4 Graph labeling 4 Graph labelings 4 Incidence matrices 4 Incidence matrix 4 Kernel 4 Labeling 4 Labelings 4 Multiplicative version 4 Polynomial algorithm 4 Possible solutions 4 Toric ideal 4 Toric ideals 4 Clique-width 2 Combinatorial mathematics 2 Combinatorics on words 2 De Bruijn 2 Equivalence classes 2 Finite alphabet 2 Finite size 2 Forbidden induced subgraphs 2 Graph class 2 Graph theory 2 Hereditary graph class 2 Induced subgraphs 2 Infinite periodic sequence 2 Lexicographic order 2 Necklaces 2