2 papers
math.DS2026
Solutions to 6 problems in recurrence and Van der Corput sets
Sohail Farhangi, Saúl Rodríguez Martín
We present solutions to six problems concerning sets of nice recurrence and van der Corput (vdC) sets. We answer a question of Moreira, repeated by Fish and Skinner, by showing tha…
math.GR2024
An inverse of Furstenberg's correspondence principle and applications to van der Corput sets
Saúl Rodríguez Martín
We obtain an inverse of Furstenberg's correspondence principle in the setting of countable cancellative, amenable semigroups. Besides being of intrinsic interest on its own, this r…