Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A discrete version of plane wave solutions of the Dirac equation in the
  Joyce form   We construct a discrete version of the plane wave solution to a discrete
Dirac-K\"{a}hler equation in the Joyce form. A geometric discretisation scheme
based on both forward and backward difference operators is used. The conditions
under which a discrete plane wave solution satisfies a discrete Joyce equation
are discussed.

20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph
9
The categories of this paper are: nlin
16
The categories of this paper are: stat
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg