Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comment to "Thomson rings in a disk"   We have found that the minimum energy configuration of $N=395$ charges
confined in a disk and interacting via the Coulomb potential, reported by
Cerkaski et al. in Ref.~\cite{Cerkaski15} is not a global minimum of the total
electrostatic energy. We have identified a large number of configurations with
lower energy, where defects are present close to the center of the disk; thus,
the formation of a hexagonal core and valence circular rings for the centered
configurations, predicted by the model of Ref.~\cite{Cerkaski15}, is not
supported by numerical evidence and the configurations obtained with this model
cannot be used as a guide for the numerical calculations, as claimed by the
authors.

12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th