Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Polarization singularities in the self-focusing of an elliptically
  polarized laser beam in an isotropic phase of cholesteric liquid crystal
  close to the temperature of phase transition   The work is devoted to the self-action of laser beams propagating in the
isotropic phase of a cholesteric liquid crystal near the transition temperature
to the mesophase in a wide range of parameter values characterizing the
nonlocality of the nonlinear optical response of the medium, defocusing in the
medium, the power of incident laser radiation and diffraction in the liquid
crystal. The origin of the primary singularities of both polarization
components of radiation in a wide range of parameters of radiation and the
medium is investigated for different values of the parameter characterizing the
nonlocality of nonlinear optical response in chiral medium. For each of the
values, the visibility diagrams of the primary singularities of both
polarization components are plotted depending on the parameters of the medium
and radiation, and their asymmetry is found.

19
The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph
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The categories of this paper are: adap-org
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The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
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The categories of this paper are: acc-phys
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The categories of this paper are: cmp-lg
26
The categories of this paper are: bayes-an