Theorem Ordinal.cof_eq_of_isNormal

Modification history

2026-03-20 14:17
Mathlib/SetTheory/Cardinal/Cofinality.lean
feat: `cof α = cof β` given a strictly monotonic function `f : α → β` with cofinal range (#36703) …
Deleted Ordinal.cof_eq_of_isNormalView on Github →
2025-12-26 17:05
Mathlib/SetTheory/Cardinal/Cofinality.lean
refactor: deprecate `Ordinal.IsNormal` for `Order.IsNormal` (#33294)
Added Ordinal.cof_eq_of_isNormalView on Github →