Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: $L^p$-Spectrum of the Schr\"odinger Operator with Inverted Harmonic
  Oscillator Potential   We determine the $L^p$-spectrum of the Schr\"odinger operator with the
inverted harmonic oscillator potential $V(x)=-x^2$ for $1 \leq p \leq \infty$.

22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
28
The categories of this paper are: alg-geom
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an