05c9905c2505c3505c8005c8205c8590b15 abeliangroups abstract algebra butinthissection combinatorialanalysis combinatorics complexnetworks eigenvalues extremalproblems fields graphalgorithms graphsandlinearalgebra(matrices graphtheory mathematicalprogramming mathematicalrecreations networkmodels noneoftheabove operationsresearch operationsresearchandmanagementscience randomgraphs rings smallworldgraphs stochastic