Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dirac quantization condition with the superconducting state   The author argues that the Dirac quantization condition might imply the
existence of an undiscovered electromagnetic structure which governs the
quantization of the electric charge and the quantization of the magnetic flux
in the superconducting state. An experimental set-up which can provide a strong
evidence by predicting the discrimination between the magnetic flux generated
by the positive and negative electric charge in the superconducting state is
also proposed.

19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
15
The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics