diff --git a/.obsidian/app.json b/.obsidian/app.json
index 6d48b70..3baaa6b 100644
--- a/.obsidian/app.json
+++ b/.obsidian/app.json
@@ -6,5 +6,7 @@
     "landscape": false,
     "margin": "0",
     "downscalePercent": 84
-  }
+  },
+  "useMarkdownLinks": true,
+  "newLinkFormat": "absolute"
 }
\ No newline at end of file
diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json
index ae975db..16be1a9 100644
--- a/.obsidian/workspace.json
+++ b/.obsidian/workspace.json
@@ -25,15 +25,18 @@
             "id": "e453bba00fdc57d6",
             "type": "leaf",
             "state": {
-              "type": "pdf",
+              "type": "markdown",
               "state": {
-                "file": "Concurrent Systems/slides/class 5.pdf"
+                "file": "Concurrent Systems/notes/4c - Dining Philosophers.md",
+                "mode": "source",
+                "source": false
               },
-              "icon": "lucide-file-text",
-              "title": "class 5"
+              "icon": "lucide-file",
+              "title": "4c - Dining Philosophers"
             }
           }
-        ]
+        ],
+        "currentTab": 1
       }
     ],
     "direction": "vertical"
@@ -201,16 +204,27 @@
       "companion:Toggle completion": false
     }
   },
-  "active": "7c5b0ca6f7687800",
+  "active": "e453bba00fdc57d6",
   "lastOpenFiles": [
-    "Concurrent Systems/notes/1 - CS Basics.md",
-    "Concurrent Systems/notes/1b - Peterson algorithm.md",
-    "Concurrent Systems/notes/2 - Fast mutex by Lamport.md",
-    "Concurrent Systems/notes/4c - Dining Philosophers.md",
+    "Concurrent Systems/notes/4 - Semaphores.md",
+    "Concurrent Systems/notes/9 - Consensus.md",
+    "Concurrent Systems/notes/10 - Implementing Consensus.md",
+    "Concurrent Systems/notes/8 - Enhancing Liveness Properties.md",
+    "Concurrent Systems/notes/7- MUTEX-free concurrency.md",
+    "Concurrent Systems/notes/6 - Atomicity.md",
+    "Concurrent Systems/notes/5 - Software Transactional Memory.md",
     "Concurrent Systems/notes/4b - Monitors.md",
     "Concurrent Systems/notes/3a - Hardware primitives & Lamport Bakery algorithm.md",
+    "Concurrent Systems/notes/1 - CS Basics.md",
+    "Concurrent Systems/notes/1b - Peterson algorithm.md",
+    "Concurrent Systems/notes/6a - Alternatives to Atomicity.md",
+    "Concurrent Systems/notes/4c - Dining Philosophers.md",
+    "Concurrent Systems/notes/2b - Round Robin algorithm.md",
+    "Concurrent.md",
+    "Concurrent Systems/slides/class 5.pdf",
+    "Concurrent Systems/notes/3b - Aravind's algorithm and improvements.md",
+    "Concurrent Systems/notes/2 - Fast mutex by Lamport.md",
     "Concurrent Systems/ignore this folder/Untitled.md",
-    "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",
@@ -220,16 +234,6 @@
     "HCIW/notes/1 - UX for IoT.md",
     "HCIW/notes/3 - Beacons.md",
     "HCIW/notes/2 - Interface and Interaction for IoT.md",
-    "Concurrent Systems/notes/10 - Implementing Consensus.md",
-    "Concurrent Systems/notes/5 - Software Transactional Memory.md",
-    "Concurrent Systems/notes/2b - Round Robin algorithm.md",
-    "Concurrent Systems/notes/3b - Aravind's algorithm and improvements.md",
-    "Concurrent Systems/notes/8 - Enhancing Liveness Properties.md",
-    "Concurrent Systems/notes/9 - Consensus.md",
-    "Concurrent Systems/notes/7- MUTEX-free concurrency.md",
-    "Concurrent Systems/notes/6 - Atomicity.md",
-    "Concurrent Systems/slides/class 5.pdf",
-    "Concurrent Systems/notes/6a - Alternatives to Atomicity.md",
     "Concurrent Systems/slides/class 4.pdf",
     "Concurrent Systems/slides/class 9.pdf",
     "Concurrent Systems/slides/class 10.pdf",
@@ -239,7 +243,6 @@
     "Concurrent Systems/notes/images/Pasted image 20250401092557.png",
     "Concurrent Systems/slides/class 6.pdf",
     "Concurrent Systems/notes/images/Pasted image 20250325090735.png",
-    "conflict-files-obsidian-git.md",
     "Concurrent Systems/slides/class 8.pdf",
     "Concurrent Systems/slides/class 7.pdf",
     "Concurrent Systems/notes/images/Pasted image 20250324091452.png",
diff --git a/Concurrent.md b/Concurrent.md
new file mode 100644
index 0000000..e69de29