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Paperback. Pub 2012 101 in East China Normal University Press. 1736. Mathematician Leonhard Euler solution K?nigsberg Seven Bridges founded the discipline of graph theory has now been two hundred years a. Graph Theory is the backbone of discrete mathematics content. Discrete mathematics. theoretical computer science and technology and network information science foundation. Graph Theory (2nd edition) through some interesting math problems and math games to the reader more popular to introduce some basic knowledge of graph theory and graph theory elementary method to expand the knowledge of high school students. to improve the analysis of problems and problem-solving abilities. 1 definition of Figure 2 vertices of degree 3 Toland Theorem 4 tree 5 Euler Hamiltonian 6 7 plan Ramsay Question 9 contest Figure Answers to