diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json
index 60dd8cf..ce7246a 100644
--- a/.obsidian/workspace.json
+++ b/.obsidian/workspace.json
@@ -213,6 +213,7 @@
   },
   "active": "cdcc59f1bf6d4ae1",
   "lastOpenFiles": [
+    "Pasted image 20250505095743.png",
     "Pasted image 20250505095249.png",
     "Concurrent Systems/slides/class 15.pdf",
     "Concurrent Systems/notes/15 - A formal language for LTSs.md",
@@ -234,7 +235,6 @@
     "Concurrent Systems/notes/11 - LTSs and Bisimulation.md",
     "Concurrent Systems/notes/13 - Weak Bisimilarity.md",
     "Pasted image 20250430192526.png",
-    "Pasted image 20250430183304.png",
     "Concurrent Systems/slides/class 13.pdf",
     "Concurrent Systems/slides/class 14.pdf",
     "Concurrent Systems/slides/class 12.pdf",
diff --git a/Concurrent Systems/notes/15 - A formal language for LTSs.md b/Concurrent Systems/notes/15 - A formal language for LTSs.md
index e9a639e..3a1380c 100644
--- a/Concurrent Systems/notes/15 - A formal language for LTSs.md	
+++ b/Concurrent Systems/notes/15 - A formal language for LTSs.md	
@@ -88,3 +88,5 @@ An easy corollary of this result is that there is a double simulation between P
 indeed, P1 can simulate P2 and viceversa, but the simulations are not bisimulations.
 ![300](../../Pasted%20image%2020250505095249.png)
 
+##### A negation and conjunction-free logic
+![](../../Pasted%20image%2020250505095743.png)
diff --git a/Pasted image 20250505095743.png b/Pasted image 20250505095743.png
new file mode 100644
index 0000000..e738485
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