Theorem WithUpperTopology.isOpen_preimage_ofUpper

Modification history

2023-09-24 19:47
Mathlib/Topology/Order/LowerUpperTopology.lean
refactor(Topology/Order): Rename order topologies (#7310) …
Deleted WithUpperTopology.isOpen_preimage_ofUpperView on Github →
2023-07-25 10:57
Mathlib/Topology/Order/LowerUpperTopology.lean
feat(Topology/Order/LowerUpperTopology): Dual the lower topology (#5873) …
Added WithUpperTopology.isOpen_preimage_ofUpperView on Github →