The aim of this book is to provide an exposition of both the theory and the applications of these categories at a level accessible to graduate students.
The articles collected here are the texts of the invited lectures given at the Eighth British Combinatorial Conference held at University College, Swansea.
An up-to-date and integrated introduction to model theory, designed to be used for graduate courses (for students who are familiar with first-order logic), and as a reference for more experienced logicians and mathematicians.