diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json
index 537688f..042ab0e 100644
--- a/.obsidian/workspace.json
+++ b/.obsidian/workspace.json
@@ -13,12 +13,12 @@
             "state": {
               "type": "markdown",
               "state": {
-                "file": "Concurrent Systems/notes/4 - Semaphores.md",
+                "file": "Concurrent Systems/test/Untitled.md",
                 "mode": "source",
                 "source": false
               },
               "icon": "lucide-file",
-              "title": "4 - Semaphores"
+              "title": "Untitled"
             }
           },
           {
@@ -201,8 +201,9 @@
       "companion:Toggle completion": false
     }
   },
-  "active": "2b2245f56092006e",
+  "active": "7c5b0ca6f7687800",
   "lastOpenFiles": [
+    "Concurrent Systems/notes/4 - Semaphores.md",
     "Foundation of data science/notes/9 XGBoost.md",
     "Foundation of data science/notes/9 Random Forest.md",
     "Foundation of data science/notes/9 K-Nearest Neighbors.md",
@@ -228,7 +229,6 @@
     "Concurrent Systems/notes/6a - Alternatives to Atomicity.md",
     "Concurrent Systems/notes/4b - Monitors.md",
     "Concurrent Systems/notes/4c - Dining Philosophers.md",
-    "Concurrent Systems/notes/4 - Semaphores.md",
     "Concurrent Systems/notes/3a - Hardware primitives & Lamport Bakery algorithm.md",
     "Concurrent Systems/slides/class 4.pdf",
     "Concurrent Systems/slides/class 9.pdf",