just isn't shut underneath subtraction (that is definitely, subtracting a single natural from another won't usually cause A further natural), means that N displaystyle mathbb N However, viewpoints and proposals — and maybe anticipations and familiarity — do differ relating to what to do in these conditions. An illustration https://ayurvedicmedicineforlifestyle.law.blog/2025/09/03/ayurvedic-medicine-for-lifestyle-disorders-cureayu-solutions/