Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Estimates for Deviations from Exact Solutions of Maxwell's Initial
  Boundary Value Problem   In this paper, we consider an initial boundary value problem for Maxwell's
equations. For this hyperbolic type problem, we derive guaranteed and
computable upper bounds for the difference between the exact solution and any
pair of vector fields in the space-time cylinder that belongs to the
corresponding admissible energy class. For this purpose, we use a method
suggested earlier for the wave equation.

10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
19
The categories of this paper are: eess
4
The categories of this paper are: cond-mat
26
The categories of this paper are: bayes-an
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys