9 lines
216 B
Text
9 lines
216 B
Text
1856.lean:10:4-10:13: warning: declaration uses 'sorry'
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case h
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α : Type ?u
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inst✝ : DecidableEq α
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i : α
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β : α → Type ?u
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f : (j : α) → β j
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x : α
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⊢ (if h : x = i then (_ : i = x) ▸ f i else f x) = f x
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