Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Inverse dynamic and spectral problems for the one-dimensional Dirac
  system on a finite tree   We consider inverse dynamic and spectral problems for the one dimensional
Dirac system on a finite tree. Our aim will be to recover the topology of a
tree (lengths and connectivity of edges) as well as matrix potentials on each
edge. As inverse data we use the Weyl-Titchmarsh matrix function or the dynamic
response operator.

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The categories of this paper are: eess
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The categories of this paper are: nucl-th
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The categories of this paper are: cond-mat
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
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The categories of this paper are: q-alg
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The categories of this paper are: q-fin
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The categories of this paper are: funct-an
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The categories of this paper are: chao-dyn
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The categories of this paper are: astro-ph
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The categories of this paper are: math-ph
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The categories of this paper are: econ
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The categories of this paper are: atom-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: adap-org
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The categories of this paper are: hep-th