Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Confluent Second-Order Supersymmetric Quantum Mechanics and Spectral
  Design   The confluent second-order supersymmetric quantum mechanics, in which the
factorization energies tend to a common value, is used to generate Hamiltonians
with known spectra departing from the hyperbolic Rosen-Morse and Eckart
potentials. The possible spectral modifications, as to create a new level or to
delete a given one, as well as the isospectral transformations, are discussed.

20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th