## An Introduction to Enumeration
Two major themes run in parallel through the book, generating functions and group theory. The former theme takes enumerative sequences and then uses analytic tools to discover how they are made up. Group theory provides a concise introduction to groups and illustrates how the theory can be used to count the number of symmetries a particular object has. These enrich and extend basic group ideas and techniques. The authors present their material through examples that are carefully chosen to establish key results in a natural setting. The aim is to progressively build fundamental theorems and techniques. This development is interspersed with exercises that consolidate ideas and build confidence. Some exercises are linked to particular sections while others range across a complete chapter. Throughout, there is an attempt to present key enumerative ideas in a graphic way, using diagrams to make them immediately accessible. The development assumes some basic group theory, a familiarity with analytic functions and their power series expansion along with some basic linear algebra. |

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### Contents

1 | |

2 Generating Functions Count | 17 |

3 Working with Generating Functions | 40 |

4 Permutation Groups | 59 |

5 Matrices Sequences and Sums | 79 |

6 Group Actions and Counting | 107 |

7 Exponential Generating Functions | 122 |