Natural This type of perform represents a partial operate on naturals, wherever the evidence of even (n) can be found as a precondition. In the Cambridge English Corpus There's no true difference between the usual initial-order objects from the mathematical discourse - for example naturals, sets and so forth - https://safeherbalsupplements.art.blog/2025/08/18/buy-herbal-medicines-online-with-cureayus-safe-remedies/