fact: Definition equiv_cu_G1G : PathSquare px0 px1 p0x p1x <~> PathCube (sq_1G px0) (sq_1G px1) 1 1 (sq_G1 p0x) (sq_G1 p1x).
imports: Basics Cubical.DPath Cubical.PathSquare Cubical.DPathSquare Types.Paths Types.Prod