Process algebras present simple and elegant models of concurrency where processes with the same behaviour are identified by semantic equivalences. A question of interest is how different semantic equivalences are related. In this seminar, an approach to this comparison using the metatheory of formats will be presented. A new format, the extended tyft/tyxt format will be presented and results will be given on how different equivalences can be compared.
The material will be presented informally, with an introduction to process algebras, and a discussion of the format and the comparison results. The aim is to give a flavour of how it is posible to reason about process algebra equivalences.