3 lines
158 B
Text
3 lines
158 B
Text
class NeZero (n : Nat) : Prop
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theorem mul_div (m n : Nat) [NeZero n] : (m * n) / n = m := sorry
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example [NeZero n] : (m * n) / n = m := by simp [mul_div m _]
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