return new Membership(value.intValue() * 1.0 / max);
return new SimpleMembership(value.intValue() * 1.0 / max);
	public Membership getMembership(int element) {		Integer value = (Integer) histogram.get(new Integer(element));		if (value == null)			value = new Integer(0);		return new Membership(value.intValue() * 1.0 / max);	}