Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A first-class approach of higher derivative Maxwell-Chern-Simons Proca
  model   The equivalence between a higher derivative extension of Maxwell-Chern-Simons
Proca model and some gauge invariant theories from the point of view of the
Hamiltonian path integral quantization in the framework of gauge-unfixing
approach is investigated. The Hamiltonian path integrals of the first-class
systems take manifestly Lorentz-covariant forms.

36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con