English
The infimum operation on MonoOver A descends to an infimum operation on Subobject A, giving a functorial infimum.
Русский
Операция наименьшего сверху над MonoOver A спускается на Subobject A, образуя функциональный инфиминум.
LaTeX
$$$ \\mathrm{inf} : \\mathrm{Subobject}(A) \\to (\\mathrm{Subobject}(A) \\to \\mathrm{Subobject}(A)) $$$
Lean4
/-- The functorial infimum on `MonoOver A` descends to an infimum on `Subobject A`. -/
def inf {A : C} : Subobject A ⥤ Subobject A ⥤ Subobject A :=
ThinSkeleton.map₂ MonoOver.inf