Theorem Order.le_cof_iff

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) …
Modified Order.le_cof_iffView on Github →
2026-03-15 22:43
Mathlib/SetTheory/Cardinal/Cofinality.lean
refactor: redefine `Order.cof` for a preorder (#35513) …
Added Order.le_cof_iffView on Github →