Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Relativistic configuration-interaction calculation of energy levels of
  core-excited states in lithium-like ions: argon through krypton   Large-scale relativistic configuration-interaction calculation of energy
levels of core-excited states of lithium-like ions is presented. Quantum
electrodynamic, nuclear recoil, and frequency-dependent Breit corrections are
included in the calculation. The approach is consistently applied for
calculating all $n=2$ core-excited states for all lithium-like ions starting
from argon ($Z = 18$) and ending with krypton ($Z = 36$). The results obtained
are supplemented with systematical estimations of calculation errors and
omitted effects.

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The categories of this paper are: math-ph
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The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
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The categories of this paper are: adap-org
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The categories of this paper are: bayes-an
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The categories of this paper are: nucl-th
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The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
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The categories of this paper are: atom-ph
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The categories of this paper are: solv-int
2
The categories of this paper are: math
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The categories of this paper are: econ
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The categories of this paper are: alg-geom
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The categories of this paper are: funct-an
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The categories of this paper are: acc-phys