Lesson 8
Schema della sezione
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Properties of bisimilarity: exercises and compositionality [RSBook 3.3]
Exercises:
- Exercises 3.3 and 3.5 in [RSBook]
- Exercise 3.15 in RSBook (Barrier)
- Exercise (Up-to bisimulation): A bisimulation up-to bisimilarity is a relation \(\mathbf{R} \subseteq \mathit{Proc} \times \mathit{Proc}\) such that, whenever \(P \mathbf{R} Q\) it holds that
- for all \(P \stackrel{\alpha}{\to} P'\) there exists \(Q \stackrel{\alpha}{\to} Q'\) with \(P' \sim P'' \mathbf{R} Q'' \sim Q'\)
- for all \(Q \stackrel{\alpha}{\to} Q'\) there exists \(P \stackrel{\alpha}{\to} P'\) with \(P' \sim P'' \mathbf{R} Q'' \sim Q'\)
Show that if \( \mathbf{R}\) is a bisimulation up-to bisimilarity then \(P \mathbf{R} Q \) implies \( P \sim Q \).