code: def gen_sl_transform_matricies(area_multiple):
      
      return [np.array(((i, j), (0, area_multiple / i)))
              for i in get_factors(area_multiple)
              for j in range(area_multiple // i)]
docs: Generates the transformation matricies that convert a set of 2D
      vectors into a super lattice of integer area multiple as proven
      in Cassels:
  
      Cassels, John William Scott. An introduction to the geometry of
      numbers. Springer Science & Business Media, 2012.
  
      Args:
          area_multiple(int): integer multiple of unit cell area for super
          lattice area
  
      Returns:
          matrix_list: transformation matricies to covert unit vectors to
          super lattice vectors