Reduction of filtered K-theory and a characterization of Cuntz-Krieger algebras

Sara E. Arklint, Rasmus Bentmann, Takeshi Katsura

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)570-613
Number of pages44
JournalJournal of K-Theory
Issue number3
Publication statusPublished - 2014 Jul 8


  • C∗-algebras
  • classification
  • filtered K-theory
  • graph C∗-algebras
  • real rank zero

ASJC Scopus subject areas

  • Algebra and Number Theory
  • Geometry and Topology


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