On the entropy norm on Ham (S2)

Michael Brandenbursky, Egor Shelukhin

Research output: Contribution to journalArticlepeer-review


In this note we prove that for each positive integer m there exists a bi-Lipschitz embedding Zm→ Ham (S2) , where Ham (S2) is equipped with the entropy metric. In particular, the same result holds when the entropy metric is replaced with the autonomous metric.

Original languageEnglish
Pages (from-to)231-237
Number of pages7
JournalAnnales Mathematiques du Quebec
Issue number1
StatePublished - 1 Apr 2021


  • Braid groups
  • Conjugation-invariant norms
  • Hamiltonian diffeomorphisms
  • Quasimorphisms
  • Topological entropy

ASJC Scopus subject areas

  • Mathematics (all)


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