Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Scattering of electromagnetic waves by many thin cylinders: theory and
  computational modeling   Electromagnetic (EM) wave scattering by many parallel infinite cylinders is
studied asymptotically as a tends to 0, where a is the radius of the cylinders.
It is assumed that the centres of the cylinders are distributed so that their
numbers is determined by some positive function N(x). The function N(x) >= 0 is
a given continuous function. An equation for the self-consistent (limiting)
field is derived as a tends to 0. The cylinders are assumed perfectly
conducting. Formula for the effective refraction coefficient of the new medium,
obtained by embedding many thin cylinders into a given region, is derived. The
numerical results presented demonstrate the validity of the proposed approach
and its efficiency for solving the many-body scattering problems, as well as
the possibility to create media with negative refraction coefficients.

25
The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an