Natural This type of purpose represents a partial function on naturals, wherever the evidence of even (n) can be seen like a precondition. Through the Cambridge English Corpus There's no serious difference between the usual 1st-order objects with the mathematical discourse - which include naturals, sets and so on - https://safeherbalsupplements.video.blog/2025/09/03/cureayu-indias-trusted-ayurvedic-wellness-brand/