Theorem: LO.FirstOrder.Semiformula.not_fvar?_upper (Logic/FirstOrder/Basic/Syntax/Formula.lean)

State before:
L : Language
ξ : Type u_1
n n₁ n₂✝ n₂ m m₁ m₂ m₃ : ℕ
p : SyntacticSemiformula L n
⊢ upper p ≤ upper p
Tactic:
simp
State after:
no goals