“…The related digital image is shown in Figure 3 A complete reduction of P (x, y) is obtained just by three choices, corresponding to the selected pairs (1, 2), (2, 1), and (1, 0). This provides the following reduction Therefore, the points (2, 2), (3,3), and (4, 4), having multiplicity 4, are covered 3 times, the points (4, 3), (3,4), (3,2), and (2, 3), having multiplicity 3, are covered 3 or 2 times, and all the double points are covered 1 or 2 times. Consequently (H(x, y) + xy 2 + x 2 y + x)F S (x, y) represents the corresponding reduced polynomial.…”