hint for add_succ

2023-12-22 14:56:28 +00:00
parent 9e90d25642
commit cfe1ae17d5
1 changed files with 2 additions and 1 deletions
--- a/Game/Levels/Tutorial/L07add_succ.lean
+++ b/Game/Levels/Tutorial/L07add_succ.lean
@@ -40,7 +40,8 @@ see which proofs you can rewrite.

 /-- For all natural numbers $a$, we have $\operatorname{succ}(a) = a+1$. -/
 Statement succ_eq_add_one n : succ n = n + 1 := by
-  Hint (hidden := true) "First unravel the `1`."
+  Hint "Start by unravelling the `1`."
+  Hint (hidden := true) "`rw [one_eq_succ_zero]` will do this."
  rw [one_eq_succ_zero]
  Hint (hidden := true) "Now you can `rw [add_succ]`"
  rw [add_succ]