Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the nonradiating motion of point charges   We investigate the possible existence of nonradiating motions of systems of
point charges, according to classical electrodynamics with retarded potentials.
We prove that two point particles of arbitrary electric charges cannot move for
an infinitely long time within a finite region of space without radiating
electromagnetic energy. We show however with an example that nonradiating
accelerated motions of systems of point charges do in general exist.

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The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph
26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
4
The categories of this paper are: cond-mat
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci