diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json
index 8634176..d8b6a8a 100644
--- a/.obsidian/workspace.json
+++ b/.obsidian/workspace.json
@@ -192,7 +192,8 @@
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     "direction": "horizontal",
-    "width": 364.5
+    "width": 364.5,
+    "collapsed": true
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@@ -212,6 +213,7 @@
   "lastOpenFiles": [
     "Concurrent Systems/slides/class 11.pdf",
     "Concurrent Systems/notes/11 - LTSs and Bisimulation.md",
+    "Pasted image 20250408093840.png",
     "Pasted image 20250408092853.png",
     "Pasted image 20250408091924.png",
     "Concurrent Systems/notes/10 - Implementing Consensus.md",
@@ -254,7 +256,6 @@
     "Concurrent Systems/slides/class 6.pdf",
     "Concurrent Systems/notes/images/Pasted image 20250325090735.png",
     "Concurrent Systems/slides/class 8.pdf",
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diff --git a/Concurrent Systems/notes/11 - LTSs and Bisimulation.md b/Concurrent Systems/notes/11 - LTSs and Bisimulation.md
index e818512..5f78c9d 100644
--- a/Concurrent Systems/notes/11 - LTSs and Bisimulation.md	
+++ b/Concurrent Systems/notes/11 - LTSs and Bisimulation.md	
@@ -37,3 +37,7 @@ In concurrency theory, we don’t use finite automata but Labeled Transition Sys
 We shall usually write s –a–> s′ instead of ⟨s,a,s′⟩ ∈ T.
 
 ### Bisimulation
+Intuitively, two states are equivalent if they can perform the same actions that lead them in states where this property still holds
+![](../../Pasted%20image%2020250408093840.png)
+P0 and Q0 are different because, after an a, the former can decide to do b or c, whereas the latter must decide this before performing a.
+
diff --git a/Pasted image 20250408093840.png b/Pasted image 20250408093840.png
new file mode 100644
index 0000000..e108569
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