Theorem Set.Finite.exists_subsingleton_isCofinal

Modification history

2026-03-23 01:32
Mathlib/Order/Preorder/Finite.lean
feat: cof α < ℵ₀ ↔ cof α ≤ 1 (#36976)
Added Set.Finite.exists_subsingleton_isCofinalView on Github →