Theorem Cardinal.isRegular_aleph_one

Modification history

2024-10-22 15:31
Mathlib/SetTheory/Cardinal/Cofinality.lean
chore: use new `ℵ_` and `ℶ_` notation (#18066)
Modified Cardinal.isRegular_aleph_oneView on Github →
2023-02-24 13:27
Mathlib/SetTheory/Cardinal/Cofinality.lean
feat port: SetTheory.Cardinal.Cofinality (#2479)
Added Cardinal.isRegular_aleph_oneView on Github →