Mathlib Changelog
v4
Changelog
About
Github
Commit
2026-03-27 17:02
a58cf2dc
View on Github →
feat: countable limit ordinal has cofinality ℵ₀ (
#37029
)
Estimated changes
Modified
Mathlib/SetTheory/Cardinal/Cofinality.lean
added
theorem
Order.cof_eq_aleph0
added
theorem
Order.cof_int
added
theorem
Order.cof_nat
added
theorem
Ordinal.cof_eq_aleph0_of_isSuccLimit
modified
theorem
Ordinal.cof_omega0