Archiv der Mathematik

, Volume 92, Issue 1, pp 80–88 | Cite as

A note on Markov type constants



We prove that, if a geodesic metric space has Markov type 2 with constant 1, then it is an Alexandrov space of nonnegative curvature. The same technique provides a lower bound of the Markov type 2 constant of a space containing a tripod or a branching point.


Markov type Alexandrov space tripod 

Mathematics Subject Classification (2000).

53C21 60J10 46B20 


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Copyright information

© Birkhäuser Verlag Basel/Switzerland 2009

Authors and Affiliations

  1. 1.Department of Mathematics, Faculty of ScienceKyoto UniversityKyotoJapan
  2. 2.Department of Mathematical SciencesUniversity of TokyoTokyoJapan

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