. Operations 24 and 25 accomplish these purposes. It may be thought anomalous that Operation 25 is represented as leaving the upper index of
still = unity. But it must be remembered that these indices always begin anew for a separate calculation, and that Operation 25 places upon
, the first value for the new calculation.
It should be remarked, that when the group (13 ... 23) is repeated, changes occur in some of the upper indices during the course of the repetition: for example,
, would become
, and