Walk Through Combinatorics, A: An Introduction To Enumeration And Graph Theory

A textbook for a combinatorics course that takes up one or two semesters. It includes a list of problems, ranging from routine exercises to research questions. The topics discussed are: the twelvefold way, cycles in permutations, the formula of inclusion and exclusion, the notion of graphs and trees, matchings and Eulerian and Hamiltonian cycles.