# Combinatorics

- 1
- A=B
- Downloadable combinatorics text by Marko Petkovsek, Herbert Wilf and Doron Zeilberger. Published by A. K. Peters.

- 2
- Algebraic Combinatorics via Finite Group Actions
- A hypertext by A. Betten, H. Fripertinger and A. Kerber.

- 4
- Generating Functions
- Introduction to generating functions with interactive java applets by Alexander Bogomolny.

- 5
- Polya's Enumeration Theorem
- An article on generating functions and Polya's theory of counting by Karl Dahlke.

- 6
- Series Expansions
- Iwan Jensen counts polyominoes (aka lattice animals), paths, and various related quantities.

- 10
- The Math Forum Math Library - Combinatorics
- Comprehensive catalog of websites relating to Combinatorics.

- 11
- Topics in Mathematics - Combinatorics
- In the Mathematics Archive at University of Tennessee, Knoxville.

- 14
- Elwyn Berlekamp - Combinatorial Game Theory
- Elwyn's research in the field, including several papers.

- 15
- Erik Demaine's Combinatorial Games
- Research on pushing blocks, Clickomania, Phutball, and sliding coins. Survey paper on algorithmic combinatorial game theory.