Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Reducibility of 1-d Schr\"odinger equation with time quasiperiodic
  unbounded perturbations, II   We study the Schr\"odinger equation on $\R$ with a potential behaving as
$x^{2l}$ at infinity, $l\in[1,+\infty)$ and with a small time quasiperiodic
perturbation. We prove that, if the perturbation belongs to a class of
unbounded symbols including smooth potentials and magnetic type terms with
controlled growth at infinity, then the system is reducible.

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The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
27
The categories of this paper are: comp-gas
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The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
13
The categories of this paper are: quant-ph
6
The categories of this paper are: astro-ph
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The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
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The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci