Natural Such a operate signifies a partial functionality on naturals, where the proof of even (n) may very well be seen for a precondition. With the Cambridge English Corpus There isn't a actual distinction between the usual to start with-order objects in the mathematical discourse - which include naturals, sets https://naturalhealthproduct.politics.blog/2025/09/03/natural-health-products-in-india-trusted-cureayu-solutions/