3 papers
math.DS2025
Dynamics of multiplicative groups over fields and Folner-Kloosterman sums
Michael Björklund, Alexander Fish
For two countably infinite fields whose multiplicative groups are isomorphic, we examine invariant couplings between the actions that these groups induce on the additive Pontryagin…
math.DS2025
Periodicity of point processes in abelian groups without lattices
Nachi Avraham-Re'em, Michael Björklund, Rickard Cullman
We investigate the intersection covolume of cross sections for probability preserving actions of a class of abelian groups without lattices, including -adic groups and the group…
math.DS2025
Ehrhart spectra of large subsets of
Michael Björklund, Rickard Cullman, Alexander Fish
This paper introduces and studies the Ehrhart spectrum of a set , defined as the set of all Ehrhart polynomials of simplices with vertices in , general…