...numbers
Although Dedekind, Peano, and Landau were interested in axiomatizing
positive
integers (natural numbers), the standard now is to work with the
nonnegative
integers.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stan Burris
Fri Jan 31 12:03:28 EST 1997