Introductory Combinatorics

Introductory Combinatorics is a well-regarded textbook that explores key combinatorial concepts including the pigeon-hole principle, counting techniques, permutations and combinations, inclusion-exclusion, generating functions, recurrence relations, and combinatorial structures such as graphs, designs, and flows in networks. The 5th Edition incorporates user feedback to refine explanations and includes a rich set of exercises. It’s designed to be clear and student-friendly, offering worked examples and applications suited to advanced undergraduates and graduate students.