Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Reduction of filtered K-theory and a characterization of Cuntz-Krieger
  algebras   We show that filtered K-theory is equivalent to a substantially smaller
invariant for all real-rank-zero C*-algebras with certain primitive ideal
spaces -- including the infinitely many so-called accordion spaces for which
filtered K-theory is known to be a complete invariant. As a consequence, we
give a characterization of purely infinite Cuntz-Krieger algebras whose
primitive ideal space is an accordion space.

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The categories of this paper are: eess
6
The categories of this paper are: astro-ph
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The categories of this paper are: econ
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The categories of this paper are: hep-th
1
The categories of this paper are: cs
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The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
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The categories of this paper are: q-bio
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The categories of this paper are: acc-phys
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The categories of this paper are: adap-org
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The categories of this paper are: nlin
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-lat
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The categories of this paper are: dg-ga
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The categories of this paper are: q-fin
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The categories of this paper are: hep-ph