16 lines
472 B
Text
16 lines
472 B
Text
LEAN_INFORMATION
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position 661:20
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A : Type,
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decA : decidable_eq A,
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all_of_subcount_eq_tt :
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∀ {l₁ l₂ : list A},
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subcount l₁ l₂ = tt → (∀ (a : 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 = tt,
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x : A,
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ih : ∀ (a : A), list.count a l₁ ≤ list.count a l₂,
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i : list.count a (a :: l₁) ≤ list.count a l₂,
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this : x = a
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⊢ list.count x (a :: l₁) ≤ list.count x l₂
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END_LEAN_INFORMATION
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