omega
V_N V_T : Type
R : V_N → PE V_N V_T
xs ys : List V_T
A : V_N
n : ℕ
ih : ∀ m < n + 1, ∀ (e : PE V_N V_T), Interpretation V_N V_T R (e, xs) (m, some ys) → ys.IsPrefix xs
ih_1 : Interpretation V_N V_T R (R A, xs) (n, some ys)
⊢ n < n + 1
no goals