Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Algebro-geometric solutions and their reductions for the Fokas-Lenells
  hierarchy   This paper is dedicated to provide theta function representations of
algebro-geometric solutions for the Fokas-Lenells (FL) hierarchy through
studying an algebro-geometric initial value problem. Further, we reduce these
solutions into $N$-dark solutions through the degeneration of associated
Riemann surfaces.

34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex
0
The categories of this paper are: hep-ph
3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
6
The categories of this paper are: astro-ph
26
The categories of this paper are: bayes-an