A characterization of the locally finite networks admitting non-constant harmonic functions of finite energy

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Abstract

We characterize the locally finite networks admitting non-constant harmonic functions of finite energy. Our characterization unifies the necessary existence criteria of Thomassen and of Lyons and Peres with the sufficient criterion of Soardi. We also extend a necessary existence criterion for non-elusive non-constant harmonic functions of finite energy due to Georgakopoulos.
Original languageEnglish
Pages (from-to)229-245
JournalPotential Analysis
Volume37
Issue number3
Early online date26 Aug 2011
DOIs
Publication statusPublished - Oct 2012

Keywords

  • math.CO
  • 31C20, 05C63, 05C81, 05C22
  • discrete potential theory
  • linear analysis on graphs
  • discrete harmonic functions
  • infinite graphs

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