An extension of Sine's counterexample

Emel'yanov E. Y., Erkursun N.

POSITIVITY, vol.13, no.1, pp.125-127, 2009 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 13 Issue: 1
  • Publication Date: 2009
  • Doi Number: 10.1007/s11117-008-2192-0
  • Journal Name: POSITIVITY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.125-127
  • Hacettepe University Affiliated: No


We generalize Sine's example [3] of a positive contraction in a C(K)-space which is mean ergodic, but its square is not.