Theorem Ordinal.isOpen_iff

Modification history

2026-08-11 12:14
Mathlib/SetTheory/Ordinal/Topology.lean
chore: delete deprecated declarations/modules from January 2026 (#42075) …
Deleted Ordinal.isOpen_iffView on Github →
2026-02-13 02:37
Mathlib/SetTheory/Ordinal/Topology.lean
feat: order topologies of successor orders (#32455)
Modified Ordinal.isOpen_iffView on Github →
2025-07-11 17:39
Mathlib/SetTheory/Ordinal/Topology.lean
refactor(SetTheory/Ordinal/Arithmetic): `Ordinal.IsLimit` → `Order.IsSuccLimit` (#26643) …
Modified Ordinal.isOpen_iffView on Github →
2023-02-18 18:40
Mathlib/SetTheory/Ordinal/Topology.lean
feat: port SetTheory.Ordinal.Topology (#2342)
Added Ordinal.isOpen_iffView on Github →