Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Operator Methods of the Parabolic Potential Barrier   The one-dimensional parabolic potential barrier dealt with in an earlier
paper is re-examined from the point of view of operator methods, for the
purpose of getting generalized Fock spaces.

1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
23
The categories of this paper are: solv-int
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph