Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Acoustojet: acoustic analogue of photonic jet phenomenon   It has been demonstrated for the first time that an existence of acoustic
analogue of photonic jet phenomenon, called acoustojet, providing for
subwavelength localization of acoustic field in the shadow area of arbitrary 3D
penetrable mesoscale particle, is possible.

31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
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
5
The categories of this paper are: gr-qc