English
Correspondence between Set α and SetSemiring α is bijective in the identity sense.
Русский
Соответствие между множеством подмножеств и SetSemiring α является биективным через тождество.
LaTeX
$$$\text{up}: \text{Set } \alpha \cong \text{SetSemiring } \alpha$$$
Lean4
/-- An alias for `Set α`, which has a semiring structure given by `∪` as "addition" and pointwise
multiplication `*` as "multiplication". -/
def SetSemiring (α : Type*) : Type _ :=
Set α
deriving Inhabited, PartialOrder, OrderBot