Natural Such a purpose represents a partial operate on naturals, where by the proof of even (n) might be seen to be a precondition. From your Cambridge English Corpus There's no true distinction between the usual initially-order objects from the mathematical discourse - which include naturals, sets and so forth https://safeherbalsupplements.science.blog/2025/08/18/cureayu-trusted-natural-health-products-india-for-all-ages/