Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Green's function for the wavized Maxwell fish-eye problem   Unique transformation properties under the hyperspherical inversion of a
partial differential equation describing a stationary scalar wave in an
$N$-dimensional ($N\geqslant2$) Maxwell fish-eye medium are exploited to
construct a closed form of the Green's function for that equation. For those
wave numbers for which the Green's function fails to exist, the generalized
Green's function is derived. Prospective physical applications are mentioned.

6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th