14 lines
342 B
Text
14 lines
342 B
Text
section
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universe variables u
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variable {A : Type u}
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example [add_semigroup A] (a : A) : a + a = a + a := rfl
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example [add_comm_semigroup A] (a : A) : a + a = a + a := rfl
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end
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section
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variable {A : Type}
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example [add_semigroup A] (a : A) : a + a = a + a := rfl
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example [add_comm_semigroup A] (a : A) : a + a = a + a := rfl
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end
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