Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Algebraic derivation of spectrum of the Dirac Hamiltonian for arbitrary
  combination of Lorentz-scalar and Lorentz-vector Coulomb potentials   Spectrum of the Dirac Equation is obtained algebraically for arbitrary
combination of Lorentz-scalar and Lorentz-vector Coulomb potentials using the
Witten's Superalgebra approach. The result coincides with that, known from the
explicit solution of Dirac equation.

9
The categories of this paper are: nlin
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The categories of this paper are: alg-geom
4
The categories of this paper are: cond-mat
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The categories of this paper are: econ
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The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
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The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
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The categories of this paper are: dg-ga
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The categories of this paper are: quant-ph
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The categories of this paper are: stat
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The categories of this paper are: solv-int
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The categories of this paper are: math-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th