Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dirac equation in (1+3) and (2+2) dimensions   We develop a systematic method to derive the Majorana representation of the
Dirac equation in (1+3)-dimensions. We compare with similar approach in
(2+2)-dimensions . We argue that our formalism can be useful to have a better
understanding of possible Majorana fermions.

25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc