diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json
index 03f87b5..5d7d6a5 100644
--- a/.obsidian/workspace.json
+++ b/.obsidian/workspace.json
@@ -33,8 +33,7 @@
               "title": "class 13"
             }
           }
-        ],
-        "currentTab": 1
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       }
     ],
     "direction": "vertical"
@@ -203,8 +202,9 @@
       "companion:Toggle completion": false
     }
   },
-  "active": "4151b8cc103dc898",
+  "active": "ec8d1a91f1f0cc7e",
   "lastOpenFiles": [
+    "Concurrent Systems/slides/class 13.pdf",
     "Concurrent Systems/notes/13 - Weak Bisimilarity.md",
     "Concurrent Systems/notes/12b - CCS cose varie.md",
     "Concurrent Systems/notes/12 - Calculus of communicating system.md",
@@ -220,7 +220,6 @@
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     "Concurrent Systems/notes/images/Pasted image 20250429084921.png",
     "Concurrent Systems/notes/images/Pasted image 20250429084358.png",
-    "Concurrent Systems/slides/class 13.pdf",
     "Concurrent Systems/slides/class 12.pdf",
     "Concurrent Systems/notes/11 - LTSs and Bisimulation.md",
     "HCIW/slides/HCI in the car.pdf",