Theorem Ordinal.aleph0_le_cof_iff

Modification history

2026-03-23 01:32
Mathlib/SetTheory/Cardinal/Cofinality.lean
feat: cof α < ℵ₀ ↔ cof α ≤ 1 (#36976)
Added Ordinal.aleph0_le_cof_iffView on Github →