Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Complex Primitive $N$th Root Of Unity: A Very Elementary Approach   This paper presents a primitive $n$th root of unity in $\mathbb C$. The
approach is very elementary and avoids the following: the complex exponential
function, trigonometry, and group theory. It also avoids differentiation,
integration, and series. The presentation of the primitive is indirect.

3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas