Mathematics 202 Graph theory-- Mathematics 129 Graph theory 79 Approximations -- expansions-- Mathematics 67 Combinatorial analysis-- Mathematics 56 Logic, Symbolic and mathematical 47 Mathematical modeling 44 Set theory-- Fuzzy sets-- Transfinite numbers 41 Mathematical logic-- Mathematics 40 Set theory 38 Combinatorial analysis 36 Fuzzy sets 26 Mathematical models 22 Lattice theory 21 Fuzzy logic 20 Computer science 19 Dissertations, Academic (Ph.D) 19 Thesis (Ph.D)-Mathematics 19 Discrete mathematics 17 Fuzzy systems 12 Algorithms 11 Graph Theory 11 Computational complexity 10 Machine theory 10 Number theory 10 Proof theory 10 Science 10 Set Theory 10 Mathematical logic 9 Numerical analysis 9