Natural Such a functionality signifies a partial function on naturals, wherever the evidence of even (n) might be found being a precondition. Within the Cambridge English Corpus There isn't any genuine difference between the same old first-order objects from the mathematical discourse - like naturals, sets and so forth - https://naturalhealthproductsindia.car.blog/2025/08/18/cureayu-pure-effective-vegetarian-ayurvedic-remedies/