Theorem: N.succ_eq_add_one (LeanTeaching/TD/TD02_sol.lean)

State before:
S : Type
image_zero : S
image_succ : N → S → S
n m a b c : N
⊢ succ a = a + 1
Tactic:
rw [one_eq_succ_zero, add_succ, add_zero]
State after:
no goals