In this way, both sides are a series in which, first, each number is simply a unit with respect to the opposite series in which it has its specifically determined being as a series of exponents; second, each number is itself one of the exponents for each member of the opposite series; and, third, it is a comparative number for the rest of the numbers of its series and, as such an amount which belongs to it also as an exponent, it has its unit, determined for itself, in the opposite series.