... = xn+1Q(x) ợ n deg(Q) + tữỡ ự n deg(Q) + P (f )f = P (g)g t P (f ) = P (g) t k = deg(Q) P (f )f = P (g)g tỗ t c C s P (f ) = P (g) + c sỷ r c = t ỵ t õ ự T (r, P (f )) Z(r, P (f ... O(1), õ Z(r, P (f )) (k + 1)T (r, f ) + O(1) ụ õ Z(r, P (f ) c) = Z(r, P (g)) Z(r, g) + Z(r, Q(g)) T (r, g) + T (r, Q(g)) t õ Z(r, P (f ) c) (k + 1)T (r, g) + O(1) ú ỵ r N (r, P (f )) ... (f ) g P (g) ởt tr t f = g ụ t ự ố ữ ỵ f P (f ) g P (g) t F = G = õ F G tr f, g s t õ ự F,G = F 2F G 2G + F F G G1 s ự F,G = t F = P (f ), G = P (g) ố ữ tr...