What is a horocyclic product, and how is it related to lamplighters ?

Research output: Contribution to journalArticle

Abstract


This is a rather personal introductory outline of an interesting class of geometric,
resp. graph- & group-theoretical structures. After an introductive section about
their genesis, the general construction of horocyclic products is presented. Three
closely related basic structures of this type are explained in more detail: Diestel-
Leader graphs, treebolic spaces, and Sol-groups, resp. -manifolds. Emphasis is
on their geometry, isometry groups, quasi-isometry classification and boundary
at infinity. Subsequently, it is clarified under which parametrisation they admit
discrete groups of isometries acting with compact quotient. Finally, further de-
velpoments are reviewed briefly.
Original languageEnglish
Pages (from-to)1-27
JournalInternationale Mathematische Nachrichten
Volume67
Issue number224
Publication statusPublished - 2013

Fields of Expertise

  • Information, Communication & Computing

Treatment code (Nähere Zuordnung)

  • Basic - Fundamental (Grundlagenforschung)

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