English
If F: C ⥤ D is initial and E has limits of shape C, then D has limits of shape D. More precisely, for any G: D ⥤ E, the limit of G is obtained by composing with F: lim_G = lim_{G ∘ F}.
Русский
Если F: C → D начальный и в E существуют пределы формы C, то в D существуют пределы формы D; предел диаграммы G: D ⥤ E задаётся как предел диаграммы G ∘ F.
LaTeX
$$$F \text{ initial} \\Rightarrow [\\text{HasLimitsOfShape } C E] \\Rightarrow [\\text{HasLimitsOfShape } D E],\\quad \\text{with } \\operatorname{Lim}(G) = \\operatorname{Lim}(G \\circ F).$$$
Lean4
theorem hasLimitsOfShape_of_initial [HasLimitsOfShape C E] : HasLimitsOfShape D E where
has_limit := fun _ => hasLimit_of_comp F