[Merged by Bors] - feat(Topology/Order): assorted lemmas #10556
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* Add `upperBounds_closure`, `lowerBounds_closure`, `bddAbove_closure`, `bddBelow_closure`. * Add `IsAntichain.interior_eq_empty`. * Generalize `nhds_left'_le_nhds_ne` and `nhds_right'_le_nhds_ne` to a `Preorder`.
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Can you put the PR that this forward-ports in the PR description? |
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LGTM modulo Eric's comment. Thanks! |
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bors merge |
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* Add `upperBounds_closure`, `lowerBounds_closure`, `bddAbove_closure`, `bddBelow_closure`. * Add `IsAntichain.interior_eq_empty`. * Generalize `nhds_left'_le_nhds_ne` and `nhds_right'_le_nhds_ne` to a `Preorder`. Partly forward-ports leanprover-community/mathlib3#16976
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Pull request successfully merged into master. Build succeeded: |
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riccardobrasca
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* Add `upperBounds_closure`, `lowerBounds_closure`, `bddAbove_closure`, `bddBelow_closure`. * Add `IsAntichain.interior_eq_empty`. * Generalize `nhds_left'_le_nhds_ne` and `nhds_right'_le_nhds_ne` to a `Preorder`. Partly forward-ports leanprover-community/mathlib3#16976
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* Add `upperBounds_closure`, `lowerBounds_closure`, `bddAbove_closure`, `bddBelow_closure`. * Add `IsAntichain.interior_eq_empty`. * Generalize `nhds_left'_le_nhds_ne` and `nhds_right'_le_nhds_ne` to a `Preorder`. Partly forward-ports leanprover-community/mathlib3#16976
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upperBounds_closure,lowerBounds_closure,bddAbove_closure,bddBelow_closure.IsAntichain.interior_eq_empty.nhds_left'_le_nhds_neandnhds_right'_le_nhds_neto aPreorder.Partly forward-ports leanprover-community/mathlib3#16976