theorem Set.subset_empty_ifftheorem Set.subset_empty_iff: ∀ {α : Type u} {s : Set α}, s ⊆ ∅ ↔ s = ∅
Published by @sam · Jul 21, 2026
View source in zpg9xh52
zpg9xh52
Definitional, with no premises to accept.
Set.subset_empty_iff
definitional fact