Theorem WithUpperSetTopology.isOpen_ofUpperSet_preimage

Modification history

2023-09-24 19:47
Mathlib/Topology/Order/UpperLowerSetTopology.lean
refactor(Topology/Order): Rename order topologies (#7310) …
Deleted WithUpperSetTopology.isOpen_ofUpperSet_preimageView on Github →
2023-09-08 07:26
Mathlib/Topology/Order/UpperLowerSetTopology.lean
feat: Functoriality of `WithUpperSetTopology` (#6988) …
Added WithUpperSetTopology.isOpen_ofUpperSet_preimageView on Github →