Introduction

This Special Issue of CPC is devoted to papers from the conference honouring the 65th birthday of Tom Trotter, held at the Georgia Institute of Technology, May 5–9 2008. The organizing committee consisted of Graham Brightwell, Dwight Duffus, Stefan Felsner, Hal Kierstead, Prasad Tetali, Robin Thomas, Peter Winkler and Xingxing Yu.