English
For a finite index set ι and an object X, there exists a wide pullback of the diagram formed by the terminal object from X and the identity maps, i.e., HasWidePullback of the corresponding arrows.
Русский
Для конечного множества индексов ι и объекта X существует широкий обратный предел диаграммы, образованной конечной точкой от X и т.д.
LaTeX
$$$\\text{HasWidePullback} \\, (\\\\text{Arrow.mk}(\\\\text{terminal.from } X)).right \, (\\lambda _ : ι, (\\\\text{Arrow.mk}(\\\\text{terminal.from } X)).left)) \(\\text{ и т.д.}$$$
Lean4
instance hasWidePullback [Finite ι] (X : C) :
HasWidePullback (Arrow.mk (terminal.from X)).right (fun _ : ι => (Arrow.mk (terminal.from X)).left)
(fun _ => (Arrow.mk (terminal.from X)).hom) :=
by
cases nonempty_fintype ι
exact ⟨⟨wideCospan.limitCone ι X⟩⟩