Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Flux tube counting or Casimir scaling   QCD confines quarks in all representations. From lattice calculations and fat
center vortices model, we discuss that the coefficient of the linear term in
the potential is proportional to both casimir scaling and the number of
fundamental strings.

2
The categories of this paper are: math
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph