Branch

2023-03-10 10:11:36 +01:00
parent b3a38ee080
commit c8c85195d7
2 changed files with 12 additions and 0 deletions
@@ -21,6 +21,9 @@ open Function

 Statement bijective_iff_has_inverse "" {A B : Type} (f : A → B) :
    Bijective f ↔ ∃ g, LeftInverse g f ∧ RightInverse g f := by
+  Branch
+    exfalso
+    Hint "Das war eine blöde Idee"
  Hint (hidden := true) "constructor"
  constructor
  Hint "intro h" -- does not show