fact: Definition pack_sigma_nondep@{i} {A : Type@{i}} {P : Type@{i}} {p q : A} {x : P} {y : P} (e' : Id p q) (e : Id x y) : Id (p, x) (q, y).
imports: Coq.Program.Tactics Equations.Init Equations.Signature Equations.CoreTactics Equations.Type.Logic Equations.Type.Classes Equations.Type.EqDec