// es el algoritmo de división y conquista, que se llama recursivamente
template < typename N, typename E >
-number < N, E > divide_n_conquer(number< N, E > u, number< N, E > v)
+number < N, E > karatsuba(number< N, E > u, number< N, E > v)
{
typedef number< N, E > num_type;
// m = u1*v1
// d = u2*v2
// h = (u1+v1)*(u2+v2) = u1*u2+u1*v2+u2*v1+u2*v2
- num_type m = divide_n_conquer(u12.first, v12.first);
- num_type d = divide_n_conquer(u12.second, v12.second);
- num_type h = divide_n_conquer(u12.first + v12.first,
+ num_type m = karastuba(u12.first, v12.first);
+ num_type d = karastuba(u12.second, v12.second);
+ num_type h = karastuba(u12.first + v12.first,
u12.second + v12.second);
// H-D-M = u1*u2+u1*v2+u2*v1+u2*v2 - u2*v2 - u1*v1 = u1*v2+u2*v1