Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Pseudospin Splitting of the Energy Spectrum of Planar Polytype
  Graphene-Based Superlattices   The energy spectrum of planar polytype graphene-based superlattices has been
investigated. It is shown that their energy spectrum undergoes pseudospin
splitting due to the asymmetry of quantum wells forming the superlattice
potential profile.

18
The categories of this paper are: econ
3
The categories of this paper are: physics
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
6
The categories of this paper are: astro-ph
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat