15 lines
272 B
Text
15 lines
272 B
Text
import logic
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open tactic
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theorem foo (A : Type) (a b c : A) : a = b → b = c → a = c ∧ c = a :=
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begin
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intros (Hab, Hbc),
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apply and.intro,
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apply eq.trans,
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rotate 2,
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apply eq.trans,
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apply (eq.symm Hbc),
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apply (eq.symm Hab),
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apply Hab,
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apply Hbc,
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end
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