15 lines
246 B
Text
15 lines
246 B
Text
universes u
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namespace ex
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structure group (α : Type u) : Type u
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structure T (α : extends group α := ()
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structure ring (α : Type u) : Type u
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class T (α : Type*) extends ring x α
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class S (α : Type*) extends ((λ x, group x) α)
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end ex
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