diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json
index ea6424b..1ede617 100644
--- a/.obsidian/workspace.json
+++ b/.obsidian/workspace.json
@@ -76,9 +76,23 @@
               "icon": "lucide-file",
               "title": "Arithmetic"
             }
+          },
+          {
+            "id": "7d1b3d98021093a7",
+            "type": "leaf",
+            "state": {
+              "type": "markdown",
+              "state": {
+                "file": "DAS/Groups.md",
+                "mode": "source",
+                "source": false
+              },
+              "icon": "lucide-file",
+              "title": "Groups"
+            }
           }
         ],
-        "currentTab": 4
+        "currentTab": 5
       }
     ],
     "direction": "vertical"
@@ -236,11 +250,12 @@
       "obsidian-git:Open Git source control": false
     }
   },
-  "active": "42deeb92efbbb47c",
+  "active": "7a0e7b37bd89861d",
   "lastOpenFiles": [
+    "DAS/Arithmetic.md",
+    "DAS/Groups.md",
     "DAS/merge.md",
     "DAS/export.css",
-    "DAS/Arithmetic.md",
     "DAS/Set Theory.md",
     "Formulas.md",
     "DAS/Functions.md",
@@ -248,7 +263,7 @@
     "DAS/Relations.md",
     "DAS/Logic.md",
     "mathe/notation.md",
-    "Studium.md",
+    "DAS/Studium.md",
     "ET/Netzwerke.md",
     "ET/Kirchhoffsche Regeln.md",
     "ET/Grundlagen.md",
diff --git a/DAS/Groups.md b/DAS/Groups.md
new file mode 100644
index 0000000..dc80f99
--- /dev/null
+++ b/DAS/Groups.md
@@ -0,0 +1,3 @@
+
+## Internal Composition law
+$$
\ No newline at end of file
diff --git a/Studium.md b/DAS/Studium.md
similarity index 100%
rename from Studium.md
rename to DAS/Studium.md