Natural This kind of perform represents a partial function on naturals, the place the proof of even (n) can be noticed being a precondition. In the Cambridge English Corpus There isn't a actual distinction between the usual to start with-order objects with the mathematical discourse - for example naturals, sets https://cureayunaturalhealth.movie.blog/2025/09/03/cureayu-vegetarian-ayurvedic-remedies-for-everyday-health/