15 lines
320 B
Text
15 lines
320 B
Text
theorem haveWithSubgoals {a b : α} : a = b ↔ b = a := by
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apply Iff.intro
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intro h
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have h' := h.symm
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exact h'
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intro h
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exact h.symm
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theorem haveWithSubgoals2 {a b : α} : a = b ↔ b = a := by {
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apply Iff.intro;
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intro h;
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have h' := h.symm;
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exact h';
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intro h; exact h.symm;
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}
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