Definition FT_tau := Build_Cone FT_tau_cone_law.(* tau# *)

 Definition FT_tau_d := Lim_diese L_X FT_tau.

(* Specifications: *)
Lemma FT_eq_tau : forall i : FT_I, FT_tau i =_S FT_tau_d o FMor G (FT_Apeps i).