disable succ_inj. #50

2024-02-20 15:02:06 +01:00
parent 30232f30e2
commit 6658392838
1 changed files with 2 additions and 0 deletions
--- a/Game/Levels/Algorithm/L05pred.lean
+++ b/Game/Levels/Algorithm/L05pred.lean
@@ -43,6 +43,8 @@ Statement (a b : ℕ) (h : succ a = succ b) : a = b := by
  rw [pred_succ]
  rfl

+DisabledTheorem MyNat.succ_inj
+
 Conclusion
 "
 Nice! You've proved `succ_inj`!