In Sweden, the set usually referred to as "de naturliga talen" (the natural numbers) is any number n such that 0 <= n.
Or, at least, that was the case when I did maths there. No idea what the default interpretation is these days.
This is mostly why I don't say "natural numbers" and instead say "positive integers" or "non-negative integers", depending on if I want 0 included or not.
Or, at least, that was the case when I did maths there. No idea what the default interpretation is these days.
This is mostly why I don't say "natural numbers" and instead say "positive integers" or "non-negative integers", depending on if I want 0 included or not.