English
Equivalences between types are in a natural sense the same as isomorphisms of types.
Русский
Эквиваленции между типами естественным образом совпадают с изоморфизмами типов.
LaTeX
$$$ \\mathrm{Equiv}(X,Y) \\;\\cong\\; X \\cong Y $$$
Lean4
/-- Equivalences (between types in the same universe) are the same as (isomorphic to) isomorphisms
of types. -/
@[simps]
def equivIsoIso {X Y : Type u} : X ≃ Y ≅ X ≅ Y where
hom e := e.toIso
inv i := i.toEquiv