array([[1.0, 0.0],
       [2.0, 1.0]], dtype=float64)
array([[5.0, 0.0, 0.0],
       [3.0, 3.0, 0.0],
       [-1.0, 1.0, 3.0]], dtype=float64)
array([[4.242640687119285, 0.0, 0.0, 0.0],
       [5.185449728701349, 6.565905201197403, 0.0, 0.0],
       [12.72792206135786, 3.046038495400855, 1.649742247909068, 0.0],
       [9.899494936611665, 1.624553864213789, 1.849711005231386, 1.392621247645583]], dtype=float64)