Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Antipodal Point Arrangements on Spheres and Classification of Normal
  Systems   For any positive integer $k>1$, we classify the antipodal point arrangements
on the sphere $S^k$ up to an isomorphism, by associating a finite complete set
of cycle invariants.

15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga