Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Transmission and reflection of Gaussian beams by anisotropic parallel
  plates   Explicit and compact expressions describing the reflection and the
transmission of a Gaussian beam by anisotropic parallel plates are given.
Multiple reflections inside the plate are taken into account as well as
arbitrary optical axis orientation and angle of incidence.

28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ