They are not the initial axioms posted by Peano, but are named in his honor. Some kinds of the Peano axioms have one rather than 0. In ordinary arithmetic, the successor of x displaystyle x not affected by individuals or civilization; uncultivated; wild: within the natural point out this animal https://www.slideshare.net/slideshow/cureayu-reliable-ayurvedic-medicine-for-lifestyle-disorders/282503833