English
There is a unique morphism between any two objects in the one-truncation of Δ[0] at truncation 2.
Русский
Между любыми двумя объектами в OneTruncation₂((truncation 2).obj Δ[0]) существует единственный морфизм.
LaTeX
$$Unique ((x ⟶ y) for x,y in OneTruncation₂((truncation 2).obj Δ[0]))$$
Lean4
/-- The homotopy category functor preserves generic terminal objects. -/
noncomputable def terminalIso : hoFunctor.obj (⊤_ SSet) ≅ ⊤_ Cat :=
hoFunctor.mapIso (terminalIsoIsTerminal stdSimplex.isTerminalObj₀) ≪≫
(terminalIsoIsTerminal isTerminalHoFunctorDeltaZero).symm