Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gaussian Laser Beams via Oblate Spheroidal Waves   We deduce a set of circularly polarized Gaussian laser beam modes via a
separation-of-variables solution to the Helmholtz wave equation in oblate
spheriodal coordinates. On transforming to cylindrical coordinates these become
the well-known Gaussian-Laguerre modes.

17
The categories of this paper are: q-fin
2
The categories of this paper are: math
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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
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
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The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph