Theorem: LO.FirstOrder.Semiformula.eval_castLE (Logic/FirstOrder/Basic/Semantics/Semantics.lean)

State before:
n₂ : ℕ
L : Language
μ : Type v
μ₁ : Type v₁
μ₂ : Type v₂
M : Type w
s : Structure L M
n : ℕ
e : Fin n → M
e₂ : Fin n₂ → M
ε : μ → M
ε₂ : μ₂ → M
n₁ : ℕ
h : n₁ ≤ n₂
p : Semiformula L μ n₁
⊢ (Eval s e₂ ε) ((Rew.castLE h).hom p) ↔ (Eval s (fun x => e₂ (Fin.castLE h x)) ε) p
Tactic:
simp [eval_rew, Function.comp]
State after:
no goals