Theorem Cardinal.countable_iff_lt_aleph_one

Modification history

2024-10-16 00:08
Mathlib/SetTheory/Cardinal/Aleph.lean
feat(SetTheory/Cardinal/Aleph): add notation for `aleph` and `beth` (#17671)
Modified Cardinal.countable_iff_lt_aleph_oneView on Github →
2024-10-11 12:40
Mathlib/SetTheory/Cardinal/Aleph.lean
chore(SetTheory/Cardinal/Ordinal): split file (#16990) …
Modified Cardinal.countable_iff_lt_aleph_oneView on Github →
2023-08-10 19:52
Mathlib/SetTheory/Cardinal/Ordinal.lean
chore: banish `Type _` and `Sort _` (#6499) …
Modified Cardinal.countable_iff_lt_aleph_oneView on Github →
2023-07-03 11:03
Mathlib/SetTheory/Cardinal/Ordinal.lean
fix: precedence of `#` (#5623)
Modified Cardinal.countable_iff_lt_aleph_oneView on Github →
2023-02-23 13:50
Mathlib/SetTheory/Cardinal/Ordinal.lean
feat: port SetTheory.Cardinal.Ordinal (#2463)
Added Cardinal.countable_iff_lt_aleph_oneView on Github →