is not really closed underneath subtraction (that's, subtracting just one natural from An additional won't always cause another natural), implies that N displaystyle mathbb N The sets used to determine natural figures satisfy the Peano axioms. It follows that every theorem which might be stated and proved in Peano https://buymemorypluscapsules.data.blog/2025/09/03/cureayu-vegetarian-ayurvedic-remedies-for-everyday-health/