rwa [eq₁, eq₂]
case h_2.inr.inr
n✝ : ℕ
v₁ v₂ : Vector ℕ n✝
h✝² : lex_impl v₁ v₂
m : ℕ
a b : Vector ℕ m
x : ℕ
xs : List ℕ
property✝³ : List.length (x :: xs) = m
y : ℕ
ys : List ℕ
property✝² : List.length (y :: ys) = m
v₁✝ v₂✝ : Vector ℕ m
x✝ : ℕ
tail✝¹ : List ℕ
property✝¹ : List.length (x✝ :: tail✝¹) = m
y✝ : ℕ
tail✝ : List ℕ
property✝ : List.length (y✝ :: tail✝) = m
h✝¹ : ¬(x✝ == y✝) = true
h✝ : ¬x = y
h : x ≤ y
heq₁ : x = x✝ ∧ xs = tail✝¹
heq₂ : y = y✝ ∧ ys = tail✝
eq₁ : x✝ = x
eq₂ : y✝ = y
⊢ x✝ ≤ y✝
no goals