Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Superintegrability of Sub-Riemannian Problems on Unimodular 3D Lie
  Groups   Left-invariant sub-Riemannian problems on unimodular 3D Lie groups are
considered. For the Hamiltonian system of Pontryagin maximum principle for
sub-Riemannian geodesics, the Liouville integrability and superintegrability
are proved.

12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio