diff --git a/Concurrent Systems/notes/12 - CCS (che non so cosa voglia dire).md b/Concurrent Systems/notes/12 - CCS (che non so cosa voglia dire).md
index ef10813..289ab2d 100644
--- a/Concurrent Systems/notes/12 - CCS (che non so cosa voglia dire).md	
+++ b/Concurrent Systems/notes/12 - CCS (che non so cosa voglia dire).md	
@@ -29,7 +29,8 @@ _{n})\space|\space P|Q \space | \space P\setminus a$$
 Dove:
 - **$\alpha _{i}.P_{i}$:** the process $P_{i}$ can perform the action $a$ and continue as the process $P_{i}$
 - $A(a_{1}\dots a_{n})$ parametric call to a process
-![](images/Pasted%20image%2020250414103800.png)
+- $P|Q$ parallel composition: P and Q are in a concurrent execution and can communicate to each-other
+	- $P\setminus a$ as described before, is the process P without $a$ (the action is hidden / )
 
 ![](images/Pasted%20image%2020250414104010.png)