English
The identity function is the identity element in the sense of OrderHom.
Русский
Идентичная функция служит единицей в рамках OrderHom.
LaTeX
$$$\\text{id}: \\alpha \\to_o \\alpha$; the underlying function is $\\mathrm{id}$ and it is monotone.$$
Lean4
/-- The identity function as bundled monotone function. -/
@[simps -fullyApplied]
def id : α →o α :=
⟨_root_.id, monotone_id⟩