Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Some aspects about semiclassical electrodynamics and gauge
  transformations   We describe the behaviour of semiclassical electrodynamics under gauge
transformations. For this purpose we observe the structure of Schr\"odinger
equation and matricial elements under these transformations. We conclude this
theory is not gauge invariant. As a consequence of this fact, we obtain a
possible loss of predictability of physical results.

30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
28
The categories of this paper are: alg-geom
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci