Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Poisson Summation and Endoscopy for $SL(3,\mathbb R)$   The group is interesting as the first example of split rank 2 semisimple
group, all the irreducible unitary representations of which are known. We make
a precise realization of the discrete series representations (in Section 2) by
using the Orbit Method and Geometric Quantization, a computation of their
traces (Section 3) and an exact formula for the noncommutative Poisson
summation and endoscopy of for this group (in Section 4).

7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph