Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Schr\"odinger operator on the zigzag half-nanotube in magnetic field   We consider the zigzag half-nanotubes
  (tight-binding approximation) in a uniform magnetic field which is described
by the magnetic Schr\"odinger operator with a periodic potential plus a
finitely supported perturbation.
  We describe all eigenvalues and resonances of this operator, and theirs
dependence on the magnetic field.
  The proof is reduced to the analysis of the periodic Jacobi operators on the
half-line with finitely supported perturbations.

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The categories of this paper are: q-bio
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The categories of this paper are: comp-gas
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The categories of this paper are: hep-ph
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The categories of this paper are: stat
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The categories of this paper are: econ
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The categories of this paper are: astro-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: solv-int
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The categories of this paper are: ao-sci
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The categories of this paper are: cmp-lg
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The categories of this paper are: q-alg
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The categories of this paper are: cs
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The categories of this paper are: cond-mat
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The categories of this paper are: nucl-ex
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The categories of this paper are: atom-ph
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The categories of this paper are: patt-sol