Fragmentation norm and relative quasimorphisms

Michael Brandenbursky, Jarek Kedra (Corresponding Author)

Research output: Contribution to journalArticlepeer-review


We prove that manifolds with complicated enough fundamental group admit measure-preserving homeomorphisms which have positive stable fragmentation norm with respect to balls of bounded measure.
Original languageEnglish
JournalProceedings of the American Mathematical Society
Publication statusAccepted/In press - 25 Apr 2019


  • measure-preserving homeomorphisms
  • Hamiltonian diffeomorphisms
  • fragmentation norm
  • relative quasimorphisms


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