activity
20132022
most citedNew results on sum-product type growth over fields

52 citations · 123 across the 14 of their papers we have counts for

collaborators

20 papers

math.NT2022

On Korobov bound concerning Zaremba's conjecture

Nikolay Moshchevitin, Brendan Murphy, Ilya Shkredov

We prove in particular that for any sufficiently large prime there is such that all partial quotients of are bounded by . For composite…

math.GR2021

Growth in linear groups

Sean Eberhard, Brendan Murphy, László Pyber +1

We prove a conjecture of Helfgott on the structure of sets of bounded tripling in bounded rank, which states the following. Let be a finite symmetric subset of $\mathrm{GL}_n(\…

math.CO2020

Growth in Some Finite Three-Dimensional Matrix Groups

Brendan Murphy, James Wheeler

We study the growth of product sets in some finite three-dimensional matrix groups. In particular, we prove two results about the group of upper triangular matrices ove…

math.CO2020★ 29 cited

On the Pinned Distances Problem in Positive Characteristic

Brendan Murphy, Giorgis Petridis, Thang Pham +2

We study the Erd\H os-Falconer distance problem for a set , where is a field of positive characteristic . If and th…

math.CO2019★ 7 cited

Bisector energy and pinned distances in positive characteristic

Brendan Murphy, Misha Rudnev, Sophie Stevens

We prove a new lower bound for the number of pinned distances over finite fields: if is a sufficiently small subset of , then there is an element in that de…

math.CO2019

Group Action Combinatorics

Brendan Murphy

This paper generalizes the basic notions of additive and multiplicative combinatorics to the setting of group actions: if is a group acting on a set , and we have subsets $A…