fact: Definition equiv_cu_GG1 : PathSquare px0 px1 p0x p1x <~> PathCube (sq_G1 px0) (sq_G1 px1) (sq_G1 p0x) (sq_G1 p1x) 1 1.
imports: Basics Cubical.DPath Cubical.PathSquare Cubical.DPathSquare Types.Paths Types.Prod