LEAN_INFORMATION
position 677:47
A : Type,
decA : decidable_eq A,
ex_of_subcount_eq_ff : ∀ {l₁ l₂}, subcount l₁ l₂ = ff → (∃ a, ¬list.count a l₁ ≤ list.count a l₂),
a : A,
l₁ l₂ : list A,
h : subcount (a :: l₁) l₂ = ff,
i : list.count a (a :: l₁) ≤ list.count a l₂,
this : subcount l₁ l₂ = ff,
ih : ∃ a, ¬list.count a l₁ ≤ list.count a l₂,
hw : ¬list.count a l₁ ≤ list.count a l₂
⊢ ¬list.count a (a :: l₁) ≤ list.count a l₂
END_LEAN_INFORMATION