Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A hybridizable discontinuous Galerkin method for electromagnetics with a
  view on subsurface applications   Two Hybridizable Discontinuous Galerkin (HDG) schemes for the solution of
Maxwell's equations in the time domain are presented. The first method is based
on an electromagnetic diffusion equation, while the second is based on
Faraday's and Maxwell--Amp\`ere's laws. Both formulations include the diffusive
term depending on the conductivity of the medium. The three-dimensional
formulation of the electromagnetic diffusion equation in the framework of HDG
methods, the introduction of the conduction current term and the choice of the
electric field as hybrid variable in a mixed formulation are the key points of
the current study. Numerical results are provided for validation purposes and
convergence studies of spatial and temporal discretizations are carried out.
The test cases include both simulation in dielectric and conductive media.

15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
4
The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci