Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum electrodynamic calculation of the hyperfine structure of 3He   The combined fine and hyperfine structure of the $2^3P$ states in $^3$He is
calculated within the framework of nonrelativistic quantum electrodynamics. The
calculation accounts for the effects of order $m\alpha^6$ and increases the
accuracy of theoretical predictions by an order of magnitude. The results
obtained are in good agreement with recent spectroscopic measurements in
$^3$He.

37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
2
The categories of this paper are: math
22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom