sig (fib_seq_to_type_fam B)-> E. Proof. exact (seq_colim_sum_ind B _ e (fun n a b => transport_const _ _ @ t n a b)). Defined.
Require Import Basics. Require Import Types. Require Import Diagrams.Diagram. Require Import Diagrams.Sequence. Require Import Diagrams.Cocone. Require Import Colimits.Colimit. Require Import Spaces.Nat.Core. Require Import Homotopy.IdentitySystems.