Mathematical models for concurrent systems

We have a reasonable understanding of models for sequential programs, although there are many open questions regarding whether established models can be simplified mathematically. When it comes to processes that may act concurrently on the same machine we have much less of a grasp on what is required for a mathematical model. The aim of this project is to explore one such model in some depth. If at all possible this should be done in such a way as to allow one to derive some general properties of suitable models. The main obstacle to be overcome will be to find a suitable universe of mathematical structures that allow the expression of at least some of the main features of concurrent processes.