ABSTRACT

Emphasizes a Problem Solving Approach
A first course in combinatorics
Completely revised, How to Count: An Introduction to Combinatorics, Second Edition shows how to solve numerous classic and other interesting combinatorial problems. The authors take an easily accessible approach that introduces problems before leading into the theory involved. Although the authors present most of the topics through concrete problems, they also emphasize the importance of proofs in mathematics.
New to the Second Edition
This second edition incorporates 50 percent more material. It includes seven new chapters that cover occupancy problems, Stirling and Catalan numbers, graph theory, trees, Dirichlet's pigeonhole principle, Ramsey theory, and rook polynomials. This edition also contains more than 450 exercises.

Ideal for both classroom teaching and self-study, this text requires only a modest amount of mathematical background. In an engaging way, it covers many combinatorial tools, such as the inclusion-exclusion principle, generating functions, recurrence relations, and Polya's counting theorem.

chapter 1|16 pages

What’s It All About?

chapter 2|22 pages

Permutations and Combinations

chapter 3|12 pages

Occupancy Problems

chapter 4|12 pages

The Inclusion–Exclusion Principle

chapter 5|18 pages

Stirling and Catalan Numbers

chapter 6|14 pages

Partitions and Dot Diagrams

chapter 8|24 pages

Partitions and Generating Functions

chapter 9|48 pages

Introduction to Graphs

chapter 10|24 pages

Trees

chapter 11|22 pages

Groups of Permutations

chapter 12|12 pages

Group Actions

chapter 13|10 pages

Counting Patterns

chapter 14|26 pages

Pólya Counting

chapter 15|10 pages

Dirichlet’s PigeonholePrinciple

chapter 16|16 pages

Ramsey Theory

chapter 17|20 pages

Rook Polynomials and Matchings