is not closed underneath subtraction (that is certainly, subtracting a single natural from A further will not constantly result in A further natural), signifies that N displaystyle mathbb N is usually a commutative monoid with id factor 0. It's a free of charge monoid on 1 generator. This commutative https://weightlossayurvedicsupplements.video.blog/2025/09/03/ayurvedic-medicine-for-lifestyle-disorders-cureayu-solutions/