John T. Griesmer

activity

20082026

most citedRecurrence, rigidity, and popular differences

12 citations · 29 across the 19 of their papers we have counts for

collaborators

Showing 2018Show all

3 papers · 1 filter

math.DS2018

Separating measurable recurrence from strong recurrence via rigidity sequences

John T. Griesmer

If $G$ is an abelian group, we say $S \subset G$ is a set of recurrence if for every probability measure preserving $G$ -system $(X, μ, T)$ and every $D \subset X$ having $μ (D) > 0$ , ther…

math.CO2018★ 2 cited

Semicontinuity of structure for small sumsets in compact abelian groups

John T. Griesmer

We study pairs of subsets $A, B$ of a compact abelian group $G$ where the sumset $A + B := {a + b : a \in A, b \in B}$ is small. Let $m$ and $m_{*}$ be Haar measure and inner Haar measure…

math.FA2018

Bohr sets in triple products of large sets in amenable groups

Michael Björklund, John T. Griesmer

We answer a question of Hegyvári and Ruzsa concerning effective estimates of the Bohr-regularity of certain triple sums of sets with positive upper Banach densities in the integers…