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**Z**has infinite size.Infinitely many integers, no upper bound.

- Computer processors can only operate with finite subset.
On a 64 bit processor, only 2

^{64}integers, upper bound 2^{32}. - How deal with operation "overflows"?
2

^{20}*2^{30}= ?

*Need domain for modeling processor arithmetic.*

Author: Wolfgang Schreiner

Last Modification: January 12, 2000