Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comments on "Composite Fermion (CF) model of quantum Hall effect:
  Two-dimensional electron systems in high magnetic fields": S. S. Mandal, M.
  R. Peterson and J. K. Jain, Phys. Rev. Lett.90, 106403(2003)   The flux quanta attachment to the electrons creates composite fermions (CFs).
The mass, the size and the density of the CF are inconsistent with real
material. The sequence of fractional charges which suggest formation of CF
agrees with the data but there are no monopoles in GaAs. Hence, the CF model is
internally inconsistent. There are two possibilities. (1) The flux quanta are
attached to the electrons. This is a theoretical possibility with nothing to do
with any experiment ever performed within the last seventy five years. It will
violate Maxwell equations and create unreal objects. (2) The CF give a sequence
which is deduced from the experimental data and hence agrees with the data
itself. In this case the masses of CF, the sizes and the densities are
internally inconsistent.

23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
15
The categories of this paper are: nucl-ex