Theorem: Imo2017P2.good_map_add_one_eq_zero_iff (Compfiles/Imo2017P2.lean)

State before:
R : Type u_1
D : Type u_2
inst✝ : DivisionRing D
f : D → D
h : good f
h0 : f 0 = 1
x : D
⊢ f (x + 1) = 0 ↔ x = 0
Tactic:
rw [good_map_eq_zero_iff h h0, add_left_eq_self]
State after:
no goals