Yes. Some mathematicians think that 0 is natural, others don’t. So “natural number” is ambiguous.
In order to avoid ambiguity, instead of using fancy “N”, you should use fancy “N0” to refer to {0,1,2,3,4,…} and “positive integers” to refer to {1,2,3,4,…}.
Yes. Some mathematicians think that 0 is natural, others don’t. So “natural number” is ambiguous.
In order to avoid ambiguity, instead of using fancy “N”, you should use fancy “N0” to refer to {0,1,2,3,4,…} and “positive integers” to refer to {1,2,3,4,…}.