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