update world 1

2023-03-10 15:14:07 +01:00
parent 27532a7688
commit 7c2b1b0482
15 changed files with 179 additions and 185 deletions
@@ -28,16 +28,16 @@ namespace MySet

 open Set

-theorem mem_univ {A : Type _} (x : A) : x ∈ (univ : Set A) := by
-  trivial
+-- theorem mem_univ {A : Type _} (x : A) : x ∈ (univ : Set A) := by
+--   trivial

-theorem not_mem_empty {A : Type _} (x : A) : x ∉ (∅ : Set A) := by
-  tauto
+-- theorem not_mem_empty {A : Type _} (x : A) : x ∉ (∅ : Set A) := by
+--   tauto

 Statement subset_empty_iff
 "." (A : Set ℕ) : A ⊆ univ := by
  intro h hA
-  apply mem_univ -- or `trivial`.
+  trivial --apply mem_univ -- or `trivial`.

 NewTactic intro trivial apply
 -- blocked: tauto simp