Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Loss of charge in a Lienard Wiechert Potential implies a hidden
  contraction   In the paper it is demonstrated that a point-like dust in a Lienard-Wiechert
potential under the constraint of axial gauging must change its velocity
'beyond' a mere change in direction when a fraction of charge is lost at a
point in space-time. The existence of a postulated hidden entity that
introduces a Lorentz contraction avoids a concealed contradiction in repeated
experimentation with charge loss in point-like dust.

35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math