8 lines
272 B
Text
8 lines
272 B
Text
@[simp] theorem getElem_fin [GetElem Cont Nat Elem Dom] (a : Cont) (i : Fin n) (h : Dom a i) :
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a[i] = a[i.1] := rfl
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example (a : Array α) (i : Fin a.size) : a[i] = a[i.1] := by
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simp
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example (a : Array α) (i : Fin a.size) : a[i] = a[i.1] := by
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rw [getElem_fin]
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