Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On centerless commutative automorphic loops   In this short paper, we survey the results on commutative automorphic loops
and give a new construction method. Using this method, we present new classes
of commutative automorphic loops of exponent 2 with trivial center.

6
The categories of this paper are: astro-ph
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an