Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gusev's stochastic model for the seismic source: high-frequency behavior
  in the far zone   This paper discusses local features in the source function that generate in
the far zone simultaneously (a) a quadratic decay of the source spectrum and
(b) the loss of radiation directivity at high frequencies. A. Gusev drew
attention to this problem and suggested that a positive solution can be
obtained for earthquake rupture front with a rather complex ("lace") structure.
Below we give a theoretical solution of the problem and show that the front
structure can be simple enough, but not smooth.

23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
16
The categories of this paper are: stat
19
The categories of this paper are: eess
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th