Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Isomorphism testing of $k$-spanning tournaments is Fixed Parameter
  Tractable   An arc-colored tournament is said to be $k$-spanning for an integer $k\geq 1$
if the union of its arc-color classes of maximal valency at most $k$ is the arc
set of a strongly connected digraph. It is proved that isomorphism testing of
$k$-spanning tournaments is fixed-parameter tractable.

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The categories of this paper are: bayes-an
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The categories of this paper are: cmp-lg
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The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
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The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
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The categories of this paper are: adap-org
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The categories of this paper are: acc-phys
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The categories of this paper are: comp-gas
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The categories of this paper are: funct-an
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The categories of this paper are: stat
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The categories of this paper are: patt-sol
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The categories of this paper are: econ
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The categories of this paper are: mtrl-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: ao-sci