Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Some exact quasi-normal frequencies of a massless scalar field in the
  Schwarzschild space-time   We show that not all quasinormal modes of a massless scalar field in the
Schwarzschild metric are encoded in the corresponding characteristic equation
expressed by means of a continued fraction. We provide an analytical formula
for these new hitherto missing quasinormal modes, and in doing that we also
construct a generalization of the Gauss convergence criterion.

17
The categories of this paper are: q-fin
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
24
The categories of this paper are: dg-ga
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex