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Mathlib v3 is deprecated.
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Def
Preorder.dual
Modification history
2023-03-28 23:45
src/order/category/Preord.lean
chore(order/category): Rename categories (#18657) …
Deleted
Preorder.dual
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2022-03-12 02:28
src/order/category/Preorder.lean
chore({category_theory,order}/category/*): Missing `dsimp` lemmas (#12593) …
Added
Preorder.dual
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