Introductory Combinatorics - 4th Edition Author:Richard A. Brualdi This book emphasizes combinatorial ideas including the pigeon-hole principle, counting techniques, permutations and combinations, Pólya counting, binomial coefficients, inclusion-exclusion principle, generating functions and recurrence relations, and combinatortial structures (matchings, designs, graphs). The volume provides a complete exa... more »mination of combinatorial ideas and techniques. For individuals interested in combinatorial concepts.« less