vault backup: 2026-02-27 12:42:31

.obsidian/workspace.json

@@ -10,20 +10,6 @@
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             "type": "leaf",
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-                "mode": "source",
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-              "title": "Functions"
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@@ -35,8 +21,7 @@
               "title": "Logic"
             }
           }
-        ],
-        "currentTab": 1
+        ]
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     ],
     "direction": "vertical"
@@ -68,7 +53,7 @@
             "state": {
               "type": "search",
               "state": {
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+                "query": "Logic",
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                 "explainSearch": false,
                 "collapseAll": false,
@@ -89,7 +74,8 @@
               "title": "Bookmarks"
             }
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       }
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     "direction": "horizontal",
@@ -183,10 +169,10 @@
       "obsidian-git:Open Git source control": false
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-  "active": "9bb2d002d5fe1179",
+  "active": "e815710c82d8b872",
   "lastOpenFiles": [
-    "DAS/Set Theory.md",
     "DAS/Functions.md",
+    "DAS/Set Theory.md",
     "DAS/Logic.md",
     "mathe/notation.md",
     "Studium.md",

DAS/Functions.md

@@ -25,4 +25,4 @@ A function is _surjective_ if every element $y in Y$ has _at minimum_ one matchi
 
 ### Bijectivity
 A function is _bijective_ if every element $y in Y$ has _exactly_ one matching $x in X$ (it is _injective_ and _surjective_)
-- $forall y in Y, exists excl x in X : f(x) = y$
+- $forall y in Y, exists excl x in X : f(x) = ySymbol$