Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Relativistic wave equations with fractional derivatives and
  pseudo-differential operators   The class of the free relativistic covariant equations generated by the
fractional powers of the D'Alambertian operator $(\square^{1/n})$ is studied.
Meanwhile the equations corresponding to n=1 and 2 (Klein-Gordon and Dirac
equations) are local in their nature, the multicomponent equations for
arbitrary n>2 are non-local. It is shown, how the representation of generalized
algebra of Pauli and Dirac matrices looks like and how these matrices are
related to the algebra of SU(n) group. The corresponding representations of the
Poincar\'e group and further symmetry transformations on the obtained equations
are discussed. The construction of the related Green functions is suggested.

20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
23
The categories of this paper are: solv-int