English
If G is a ComposableArrows C n, then the composite arrow G.hom is a transfinite composition of shape Fin(n+1).
Русский
Если G является ComposableArrows C n, то композиция стрел G.hom является трансфинитной композицией формы Fin(n+1).
LaTeX
$$$\text{TransfiniteCompositionOfShape}(\text{Fin} (n+1), G.hom)$$$
Lean4
/-- A transfinite composition of shape `J` induces a transfinite composition
of shape `Set.Iic j` for any `j : J`. -/
@[simps]
noncomputable def iic (j : J) : TransfiniteCompositionOfShape (Set.Iic j) (c.F.map (homOfLE bot_le : ⊥ ⟶ j))
where
F := (Set.initialSegIic j).monotone.functor ⋙ c.F
isoBot := Iso.refl _
incl :=
{ app i := c.F.map (homOfLE i.2)
naturality i i'
φ := by
dsimp
rw [← Functor.map_comp, Category.comp_id]
rfl }
isColimit := colimitOfDiagramTerminal isTerminalTop _