fact: Definition equiv_sq_flip_h {A : Type} {a00 a10 a01 a11 : A} {px0 : a00 = a10} {px1 : a01 = a11} {p0x : a00 = a01} {p1x : a10 = a11} : PathSquare px0 px1 p0x p1x <~> PathSquare px1 px0 p0x^ p1x^.
imports: Basics Types.Paths Types.Prod DPath