Natural This type of purpose signifies a partial purpose on naturals, where the proof of even (n) can be seen to be a precondition. From your Cambridge English Corpus There's no serious distinction between the usual initial-order objects with the mathematical discourse - for instance naturals, sets and so on https://buyayurvedicproductsonline.data.blog/2025/09/03/ayurvedic-lifestyle-care-solutions-buy-from-cureayu-online/