Natural This type of functionality represents a partial operate on naturals, where the evidence of even (n) can be observed being a precondition. From your Cambridge English Corpus There is absolutely no real distinction between the usual initially-order objects in the mathematical discourse - like naturals, sets and so on https://naturalhealthproduct.politics.blog/2025/09/03/natural-health-products-in-india-trusted-cureayu-solutions/