Natural Such a function represents a partial functionality on naturals, wherever the proof of even (n) might be found like a precondition. From the Cambridge English Corpus There isn't a true distinction between the usual initially-order objects on the mathematical discourse - for example naturals, sets and so on - https://buybdactive-mgtablets.blogspot.com/2025/09/ayurvedic-remedies-for-modern-living.html