diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json
index 5eba11f..2f38032 100644
--- a/.obsidian/workspace.json
+++ b/.obsidian/workspace.json
@@ -13,12 +13,12 @@
             "state": {
               "type": "markdown",
               "state": {
-                "file": "Concurrent Systems/notes/6a - Alternatives to Atomicity.md",
+                "file": "Concurrent Systems/notes/7- MUTEX-free concurrency.md",
                 "mode": "source",
                 "source": false
               },
               "icon": "lucide-file",
-              "title": "6a - Alternatives to Atomicity"
+              "title": "7- MUTEX-free concurrency"
             }
           },
           {
@@ -32,6 +32,18 @@
               "icon": "lucide-file-text",
               "title": "class 5"
             }
+          },
+          {
+            "id": "070e50bf8e547731",
+            "type": "leaf",
+            "state": {
+              "type": "pdf",
+              "state": {
+                "file": "Concurrent Systems/slides/class 6.pdf"
+              },
+              "icon": "lucide-file-text",
+              "title": "class 6"
+            }
           }
         ]
       }
@@ -204,12 +216,12 @@
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+    "Concurrent Systems/slides/class 6.pdf",
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     "Concurrent Systems/notes/5 - Software Transactional Memory.md",
     "Concurrent Systems/slides/class 5.pdf",
     "Concurrent Systems/notes/4c - Dining Philosophers.md",
-    "Concurrent Systems/slides/class 6.pdf",
     "Concurrent Systems/notes/8 - Enhancing Liveness Properties.md",
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