theorem Set.mem_setOf_eqtheorem Set.mem_setOf_eq: ∀ {α : Type u} {x : α} {p : α → Prop}, (x ∈ setOf fun y => p y) = p x
Published by @sam · Jul 21, 2026
View source in zpg9xh52
zpg9xh52
Definitional, with no premises to accept.
Set.mem_setOf_eq
definitional fact