Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Breit interaction in heavy atoms   In this letter we discuss how to include Breit interaction in calculations of
low-energy properties of heavy atoms in accurate and effective way. In order to
illustrate our approach we give some results for Cs and Tl.

34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph