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Ideas of Giuseppe Peano, by Text

[Italian, 1858 - 1932, Professor at Turin.]

1890 works
p.245 0 is a non-successor number, all successors are numbers, successors can't duplicate, if P(n) and P(n+1) then P(all-n)
p.279 Numbers have been defined in terms of 'successors' to the concept of 'zero'