Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Simple Atoms, Quantum Electrodynamics and Fundamental Constants   This review is devoted to precision physics of simple atoms. The atoms can
essentially be described in the framework of quantum electrodynamics (QED),
however, the energy levels are also affected by the effects of the strong
interaction due to the nuclear structure. We pay special attention to QED tests
based on studies of simple atoms and consider the influence of nuclear
structure on energy levels. Each calculation requires some values of relevant
fundamental constants. We discuss the accurate determination of the constants
such as the Rydberg constant, the fine structure constant and masses of
electron, proton and muon etc.

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The categories of this paper are: econ
32
The categories of this paper are: atom-ph
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio