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Def preorder.dual

Modification history

2018-08-14 16:11
order/basic.lean
feat(order): add order_dual (similar to with_top/with_bot) and dual order instances
Deleted preorder.dualView on Github →
2018-01-11 16:26
order/basic.lean
refactor(order/basic): remove "increasing/decreasing" unusual defs
Added preorder.dualView on Github →