This final chapter is entirely devoted to problems which you might try solving. They are all to be done with the Rodin Platform, which you can download from the web site “event-b.org”. We recommend beginners who are downloading the Rodin Platform for the first time to “perform” the tutorial which is included on this site before engaging in any of the problems presented in this chapter.

These problems are divided up into three categories called Exercises (Section 1), Projects (Section 2), and Mathematical developments (Section 3).

Exercises are small and easy developments, mainly corresponding to the construction of simple sequential programs. But we also find models of simple complete systems and even the development of a small electronic circuit. Exercises can be proposed in a beginner course.

Projects are more serious problems, which require more investment than exercises. They can be proposed in an advanced course.

Mathematical developments come from pure mathematics. They involve more complicated proofs than in the two previous cases; most of them are not performed automatically by the provers of the Rodin Platform. As such, they represent excellent exercises to improve our ability to perform interactive proofs.

For Exercises and Projects, we are required to write a requirements document as well as a refinement strategy before engaging in the formal development with the Rodin Platform. Most of the time, we will have to use some contexts to define the carrier sets and the constants of the problem at hand.