simp [lMap_rel, Rew.rel, Operator.operator, Operator.LT.sentence_eq]
L : Language
inst✝ : L.ORing
ξ : Type u_1
n : ℕ
v : Fin 2 → Semiterm ℒₒᵣ ξ n
⊢ (lMap Language.oringEmb) (op(<).operator v) =
    (“!!(Semiterm.lMap Language.oringEmb (v 0)) < !!(Semiterm.lMap Language.oringEmb (v 1))”)
L : Language
inst✝ : L.ORing
ξ : Type u_1
n : ℕ
v : Fin 2 → Semiterm ℒₒᵣ ξ n
⊢ (fun i => Semiterm.lMap Language.oringEmb (v i)) = fun i =>
    ![Semiterm.lMap Language.oringEmb (v 0), Semiterm.lMap Language.oringEmb (v 1)] i