Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Intertwining technique for a system of difference Schroedinger equations
  and new exactly solvable multichannel potentials   The intertwining operator technique is applied to difference Schroedinger
equations with operator-valued coefficients. It is shown that these equations
appear naturally when a discrete basis is used for solving a multichannel
Schroedinger equation. New families of exactly solvable multichannel
Hamiltonians are found.

21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
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The categories of this paper are: q-fin
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The categories of this paper are: solv-int
3
The categories of this paper are: physics
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The categories of this paper are: bayes-an
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The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th