Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electromagnetic energy-momentum and forces in matter   We discuss the electromagnetic energy-momentum distribution and the
mechanical forces of the electromagnetic field in material media. There is a
long-standing controversy on these notions. The Minkowski and the Abraham
energy-momentum tensors are the most well-known ones. We propose a solution of
this problem which appears to be natural and self-consistent from both a
theoretical and an experimental point of view.

14
The categories of this paper are: math-ph
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph
17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
11
The categories of this paper are: hep-lat
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph