Natural This kind of perform represents a partial operate on naturals, where the proof of even (n) might be witnessed for a precondition. With the Cambridge English Corpus There's no serious distinction between the usual initially-order objects in the mathematical discourse - which include naturals, sets and so on - https://buyherbalmedicines.finance.blog/2025/09/03/natural-health-products-in-india-trusted-cureayu-solutions/