Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Angular-Radial Integrability of Coulomb-like Potentials in Dirac
  Equations   We consider the Dirac equation, written in polar formalism, in presence of
general Coulomb-like potentials, that is potentials arising from the time
component of the vector potential and depending only on the radial coordinate,
in order to study the conditions of integrability, given as some specific form
for the solution: we find that the angular dependence can always be integrated,
while the radial dependence is reduced to finding the solution of a Riccati
equation so that it is always possible at least in principle. We exhibit the
known case of the Coulomb potential and one special generalization as examples
to show the versatility of the method.

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The categories of this paper are: math
15
The categories of this paper are: nucl-ex
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The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
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The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
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The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
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The categories of this paper are: eess
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The categories of this paper are: cs
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The categories of this paper are: astro-ph
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The categories of this paper are: solv-int
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The categories of this paper are: dg-ga
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The categories of this paper are: stat
35
The categories of this paper are: mtrl-th