9 lines
247 B
Text
9 lines
247 B
Text
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import data.vector
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open vector nat decidable
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variable A : Type
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definition foo [H : decidable_eq A] : ∀ {n : nat} (v₁ v₂ : vector A n), decidable (v₁ = v₂)
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| ⌞0⌟ [] [] := sorry
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| ⌞n+1⌟ (a::v₁) (b::v₂) := sorry
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