Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Simplicity of the Eigenvalues of the Non-self-adjoint
  Mathieu-Hill Operators   We find conditions on the potential of the non-self-adjoint Mathieu-Hill
operator such that the all eigenvalues of the periodic, antiperiodic, Dirichlet
and Neumann boundary value problems are simple.

22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg