Graph theory Directed graphs 4 Hamiltonian graph theory 3 Polynomials 3 Algorithms 2 Bipartite graphs 2 Combinatorial analysis 2 Finite groups 2 Graphic methods 2 Mathematical models 2 Number theory 2 Abelian groups 1 Administration 1 Cayley graphs 1 Chromatic polynomials 1 Coding theory 1 D-graphs 1 Data Processing 1 Data processing 1 Dissertations 1 Dissertations, Academic 1 Electronic data processing 1 Genetic algorithms 1 Graph coloring 1 Isomorphisms (Mathematics) 1 Keyboarding 1 Lattice theory 1 Magic squares 1 Map-coloring problem 1 Mathematics 1