English
Characterize the forward direction of the isomorphism in PreservesColimit₂: the hom component matches the canonical maps into the colimit.
Русский
Характеризуется прямая часть изоморфизма в PreservesColimit₂: компонентHom совпадает с каноническими отображениями в колимит.
LaTeX
$$@[reassoc (attr := simp)] theorem map_ι_comp_isoColimitUncurryWhiskeringLeft₂_hom (…): …$$
Lean4
/-- Characterize the forward direction of the isomorphism
`PreservesLimit₂.isoObjConePointsOfIsLimit` w.r.t. the canonical maps to the limit. -/
@[reassoc (attr := simp)]
theorem isoObjConePointsOfIsLimit_hom_comp_π (j : J₁ × J₂) :
(isoObjConePointsOfIsLimit G hc₁ hc₂ hc₃).hom ≫ c₃.π.app j =
(G.map <| c₁.π.app j.1).app c₂.pt ≫ (G.obj <| K₁.obj j.1).map (c₂.π.app j.2) :=
by
dsimp [isoObjConePointsOfIsLimit, Functor.mapCocone₂]
cat_disch