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math.GT2018
Fragmentation norm and relative quasimorphisms
Michael Brandenbursky, Jarek Kędra
We prove that manifolds with complicated enough fundamental group admit measure-preserving homeomorphisms which have positive stable fragmentation norm with respect to balls of bou…
math.GT2018
On the entropy norm on the group of diffeomorphisms of closed oriented surface
Michael Brandenbursky, Arpan Kabiraj
We prove that the entropy norm on the group of diffeomorphisms of a closed orientable surface of positive genus is unbounded.