9 lines
282 B
Text
9 lines
282 B
Text
universes u
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class densely_ordered (α : Type u) [preorder α] : Prop :=
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(dense : ∀ a c : α, a < c → ∃ b, a < b ∧ b < c)
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-- [preorder α] should be instance implicit in all of the following:
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#check @densely_ordered
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#check @densely_ordered.mk
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#check @densely_ordered.dense
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