diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json
index 21d1e83..8c116c8 100644
--- a/.obsidian/workspace.json
+++ b/.obsidian/workspace.json
@@ -78,7 +78,7 @@
       }
     ],
     "direction": "horizontal",
-    "width": 300
+    "width": 200
   },
   "right": {
     "id": "8a65bc0c1d4d98f2",
diff --git a/DAS/Set Theory.md b/DAS/Set Theory.md
index 55094e6..c9cf994 100644
--- a/DAS/Set Theory.md	
+++ b/DAS/Set Theory.md	
@@ -89,4 +89,5 @@ $$
 | Relation         | Explanation                                                                                                           | Example                 |
 | ---------------- | --------------------------------------------------------------------------------------------------------------------- | ----------------------- |
 | *transitive*<br> | "chain reaction", a information about $a$ in relation to $c$ can be inferred from the relations $a -> b$ and $b -> c$ | $a < b, b < c => a < c$ |
-|                  |                                                                                                                       |                         |
+| *reflexive*      | every element is related to itself with the given relation                                                            | $a <= a, 5 = 5$         |
+| *anti-reflexive* | every element is *NOT* related to itself in the given relation                                                        | $a < a$                 |