18 lines
288 B
Text
18 lines
288 B
Text
example : ∀ a b : nat, a = b → b = a :=
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begin
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introv h,
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exact h.symm
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end
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example : ∀ a b : nat, a = b → ∀ c, b = c → a = c :=
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begin
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introv h₁ h₂,
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exact h₁.trans h₂
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end
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example : ∀ a b : nat, a = b → b = a :=
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begin
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introv,
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intro h,
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exact h.symm
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end
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