diff --git a/.obsidian/app.json b/.obsidian/app.json
index 5dd7d4a..6d48b70 100644
--- a/.obsidian/app.json
+++ b/.obsidian/app.json
@@ -1,7 +1,7 @@
 {
   "alwaysUpdateLinks": true,
   "pdfExportSettings": {
-    "includeName": false,
+    "includeName": true,
     "pageSize": "A4",
     "landscape": false,
     "margin": "0",
diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json
index 15cbbb6..817f796 100644
--- a/.obsidian/workspace.json
+++ b/.obsidian/workspace.json
@@ -11,14 +11,12 @@
             "id": "383fb8ddbc7a9dc8",
             "type": "leaf",
             "state": {
-              "type": "markdown",
+              "type": "pdf",
               "state": {
-                "file": "Concurrent Systems/notes/6 - Atomicity.md",
-                "mode": "source",
-                "source": false
+                "file": "Concurrent Systems/slides/class 6.pdf"
               },
-              "icon": "lucide-file",
-              "title": "6 - Atomicity"
+              "icon": "lucide-file-text",
+              "title": "class 6"
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           }
         ]
@@ -192,10 +190,10 @@
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     "Concurrent Systems/notes/7- MUTEX-free concurrency.md",
-    "Concurrent Systems/notes/6 - Atomicity.md",
     "Concurrent Systems/slides/class 8.pdf",
     "Concurrent Systems/notes/1b - Peterson algorithm.md",
     "Concurrent Systems/notes/2b - Round Robin algorithm.md",