These are definitely not the original axioms printed by Peano, but are named in his honor. Some kinds of the Peano axioms have one in place of 0. In common arithmetic, the successor of x displaystyle x 「関家の森」ではなく「関さんの森」というところがいいですね。親しみを感じます。 Nevertheless, The 2 definitions are usually not equivalent, as there are theorems https://onlineherbalmedicines.blogspot.com/2025/09/cureayu-top-ayurvedic-brand-for.html