6 lines
190 B
Text
6 lines
190 B
Text
example (as bs : Array α) (v : α)
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(i : Nat)
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(h₁ : i < as.size)
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(h₂ : bs = as.set i v)
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: (as.set i v).size = as.size → as.size = bs.size := by
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grind
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