Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the validity of the LAD and LL classical radiation-reaction equations   The search of the correct equation of motion for a classical charged particle
under the action of its electromagnetic (EM) self-field, the so-called
\textit{radiation-reaction equation of motion}, remains elusive to date. In
this paper we intend to point out why this is so. The discussion is based on
the direct construction of the EM self-potentials produced by a charged
spherical particle under the action of an external EM force. In particular we
intend to analyze basic features of the LAD (Lorentz-Abraham-Dirac) and the LL
(Landau-Lifschitz) equations. Both are shown to lead to incorrect or incomplete
results.

25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
6
The categories of this paper are: astro-ph