They're not the initial axioms published by Peano, but are named in his honor. Some types of the Peano axioms have one instead of 0. In ordinary arithmetic, the successor of x displaystyle x Using this definition, given a natural selection n, the sentence "a established S has n elements" https://buymemorypluscapsules.data.blog/2025/09/03/cureayu-vegetarian-ayurvedic-remedies-for-everyday-health/