10 lines
184 B
Text
10 lines
184 B
Text
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587.lean:13:2: proof state
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A B : Type₁,
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s : setoid A,
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f : A → B,
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c : ∀ (a₁ a₂ : A), a₁ ≈ a₂ → f a₁ = f a₂,
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a : A,
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g h : B → B,
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gh : g = h
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⊢ g (f a) = h (f a)
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