Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spectral bounds for the cutoff Coulomb potential   The method of potential envelopes is used to analyse the bound-state spectrum
of the Schroedinger Hamiltonian H = -Delta -v/(r+b), where v and b are
positive. We established simple formulas yielding upper and lower energy bounds
for all the energy eigenvalues.

35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
24
The categories of this paper are: dg-ga
17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio