Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Digraphs from Endomorphisms of Finite Cyclic Groups   We associate each endomorphism of a finite cyclic group with a digraph and
study many properties of this digraph, including its adjacent matrix and
automorphism group.

4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg