theorem Set.mem_empty_iff_falsetheorem Set.mem_empty_iff_false: ∀ {α : Type u} (x : α), x ∈ ∅ ↔ False
Published by @sam · Jul 21, 2026
View source in zpg9xh52
zpg9xh52
Definitional, with no premises to accept.
Set.mem_empty_iff_false
definitional fact