/* (non-Javadoc)
* @see com.amtx.math.Group#op(java.lang.Object, java.lang.Object)
*/
@Override
public Polynomial<T> op(final Polynomial<T> p1, final Polynomial<T> p2) {
Polynomial<T> p = addition.identity();
for (Map.Entry<Integer, T> e : p1.coefficients.entrySet()) {
int i = e.getKey();
T d1 = e.getValue();
for (Map.Entry<Integer, T> e2 : p2.coefficients.entrySet()) {
int j = e2.getKey();
T d2 = e2.getValue();
p = addition.op(p, addition.identity().setCoefficient(i + j, ring.multiply(d1, d2)));
}
}
return p;
}
/**
* Constructs a PolynomialMultiplication
*
* @param addition The addition group
* @param ring Ring for the coefficients
*/
public PolynomialMultiplication(Group<Polynomial<T>> addition, Ring<T, ?> ring) {
super();
this.addition = addition;
this.ring = ring;
this.one = addition.identity().setCoefficient(0, ring.one());
}