Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonlinear phenomena of generation of longitudinal electric current by
  transversal electromagnetic field in plasmas   The analysis of nonlinear interaction of transversal electromagnetic field
with collisionless plasma is carried out. Formulas for calculation electric
current in collisionless plasma with arbitrary degree of degeneration of
electronic gas are deduced. It has appeared, that the nonlinearity account
leads to occurrence of the longitudinal electric current directed along a wave
vector. This second current is orthogonal to the known transversal current,
received at the classical linear analysis.

1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin