CAT(0) spaces and expanders

Takefumi Kondo

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


We construct a CAT(0) space Y with Izeki-Nayatani invariant δ(Y) = 1. By a similar construction, we also prove that there exists a CAT(0) space which does not have Markov type p for every p > 1.

Original languageEnglish
Pages (from-to)343-355
Number of pages13
JournalMathematische Zeitschrift
Issue number1-2
Publication statusPublished - 2012 Jun 1


  • CAT(0) space
  • Izeki-Nayatani invariant
  • Markov type
  • Spectral gap

ASJC Scopus subject areas

  • Mathematics(all)

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