public Polynomial div(Polynomial poly) {
if (!poly.isConstantPoly())
throw new IllegalArgumentException(
"Can currently only divide by numbers and not polynomials");
int deg = coeffs.length - 1;
Number lcoeffs[] = new Number[deg + 1];
for (int i = 0; i < deg + 1; ++i)
lcoeffs[i] = ((HasDivI) baseRing).div(coeffs[i], poly.getCoeff(0));
return valueOf(lcoeffs);
}
public Polynomial pow(int exp) {
if (exp == 0) return valueOf(new Number[] {baseRing.getONE()});
if (exp == 1) return valueOf(this.getCoeffs());
if (exp < 0)
throw new IllegalArgumentException("Tried to raise a Polynomial to a negative power");
Polynomial res = valueOf(new Number[] {baseRing.getONE()});
Polynomial currentPower = this;
int ex = exp;
while (ex != 0) {
if ((ex & 1) == 1) res = res.mul(currentPower);
ex >>= 1;
if (ex == 0) break;
currentPower = currentPower.mul(currentPower);
}
return res;
}
public boolean equalsPoly(Polynomial n) {
if (this.getDegree() != n.getDegree()) return false;
for (int i = 0; i <= this.getDegree(); ++i)
if (!baseRing.equals(this.getCoeff(i), n.getCoeff(i))) return false;
return true;
}
