theorem Set.univ_subset_ifftheorem Set.univ_subset_iff: ∀ {α : Type u} {s : Set α}, univ ⊆ s ↔ s = univ
Published by @sam · Jul 21, 2026
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zpg9xh52
Definitional, with no premises to accept.
Set.univ_subset_iff
definitional fact