@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		AlgebraicParticle other = (AlgebraicParticle) obj;
		if (exponent != other.exponent)
			return false;
		if (sign != other.sign)
			return false;
		return true;
	}