Theorem: LO.FirstOrder.Semiterm.mem_fvarList_func (Logic/FirstOrder/Basic/Syntax/Term.lean)

State before:
L : Language
L' : Language
L₁ : Language
L₂ : Language
L₃ : Language
ξ : Type u_1
ξ' : Type u_2
ξ₁ : Type u_3
ξ₂ : Type u_4
ξ₃ : Type u_5
n n₁ n₂ n₃ : ℕ
inst✝ : DecidableEq ξ
x : ξ
k : ℕ
f : L.Func k
v : Fin k → Semiterm L ξ n
⊢ x ∈ (func f v).fvarList ↔ ∃ i, x ∈ (v i).fvarList
Tactic:
simp[fvarList]
State after:
no goals