Natural This type of function represents a partial functionality on naturals, where by the evidence of even (n) might be seen to be a precondition. In the Cambridge English Corpus There's no actual difference between the standard 1st-order objects of the mathematical discourse - like naturals, sets and so forth https://buyherbalmedicines.game.blog/2025/09/03/natural-health-products-in-india-trusted-cureayu-solutions/