proposition: Lemma FT_diag3 : FT_Apeps FT_j0 =_S (FT_Apeps FT_m0 o FT_t'') o FT_q.
proof: Proof. apply Trans with (FT_Apeps FT_m0 o FT_t'' o FT_q). apply (Eq_cone FT_eps FT_c2). apply Ass. Qed.
imports: FSC_inc Comma_proj FAFT_SSC2 Th_Adjoint Pres_Limits Pullbacks1