Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Solutions for the L\'evy-Leblond or parabolic Dirac equation and its
  generalizations   In this paper we determine solutions for the L\'evy-Leblond operator or a
parabolic Dirac operator in terms of hypergeometric functions and spherical
harmonics. We subsequently generalise our approach to a wider class of Dirac
operators depending on 4 parameters.

3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
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The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
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The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int