Overlapping the neg integers with the pf..........and working backwards.............as in........2 with - 1................3 with - 2..................and repeating that for every 10 negative numbers.......produces.............ten 1's................ten - 9's............ten - 19's................two 19s.........from e..................1828 is in there twice............


IntegersIntegers are like whole numbers, but they also include negative numbers ... but still no fractions allowed!

So, integers can be negative {-1, -2,-3, -4, -5, ... }, positive {1, 2, 3, 4, 5, ... }, or zero {0}
We can put that all together like this:

Integers = { ..., -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, ... }