Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Semigroup expansions for non-selfadjoint Schr\"odinger operators   A large time expansion for the propagator associated to a semiclassical
non-selfadjoint magnetic Schr\"odinger operator is established, in terms of the
low lying eigenvalues of the operator.

31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
16
The categories of this paper are: stat
3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas