Definition inverseInversePathOver2 {X:Type} {x x':X} {p:x'=x} {Y : X -> Type} {y : Y x} {y' : Y x'} (s : PathOver (!p) y y') : inversePathOver (inversePathOver' s) = s. Proof. induction p, s. reflexivity. Defined.
Require Import UniMath.Foundations.All. Require Import UniMath.MoreFoundations.Tactics. Require Import UniMath.MoreFoundations.PartA.