diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json
index 47d531b..53fa912 100644
--- a/.obsidian/workspace.json
+++ b/.obsidian/workspace.json
@@ -34,9 +34,9 @@
               "type": "pdf",
               "state": {
                 "file": "Concurrent Systems/slides/class 4.pdf",
-                "page": 13,
+                "page": 14,
                 "left": -27,
-                "top": 96,
+                "top": 94,
                 "zoom": 0.5754156769596199
               },
               "icon": "lucide-file-text",
diff --git a/Concurrent Systems/notes/4b -.md b/Concurrent Systems/notes/4b -.md
index 423abac..2928348 100644
--- a/Concurrent Systems/notes/4b -.md	
+++ b/Concurrent Systems/notes/4b -.md	
@@ -55,4 +55,18 @@ C.signal() :=
 		PRIO.down()
 		NPR--
 ```
-p.s. The wait **always** suspends, even if there is only a process.
\ No newline at end of file
+p.s. The wait **always** suspends, even if there is only a process.
+
+#### Readers/Writers problem, strong priority to Readers
+```
+monitor RW_READERS :=
+	AR, WR, AW, WW init at 0
+	condition CR, CW
+
+operation begin_read() :=
+	WR++
+	if AW != 0 then
+		CR.wait()
+		CR.signal()
+
+```
\ No newline at end of file