Selected Publications

Polynomial averages and pointwise ergodic theorems on nilpotent groups, I: Step two groups
(with A. Ionescu. M.A. Mirek, T. Szarek)\\ Inventiones Math. 168, (2023), 1-118

Simplices in thin subsets of Euclidean spaces (with A. Iosevich)\\
Analysis PDE, 16 no. 7, (2023), 1485-1496

Weak hypergraph regularity and applications to geometric Ramsey theory (with N. Lyall)\\
Transactions Amer. Math. Soc. B 9.5, (2022), 160-207.

Discrete multilinear maximal operators associated to simplices (with B. Cook, N. Lyall)\\
Journal of the London Math. Soc., v 104/4, (2021), 1491-1514.

Distance graphs and sets of positive upper density in R^d (with N. Lyall)
Analysis PDE v.13/3 (2020), 385-400.

Spherical configurations over finite fields (with N. Lyall, H. Parshall)\\
American J. Math. v. 142/2. (2020) 373-404.

A multidimensional Szemeredi theorem in the primes (with B. Cook, T. Titichetrakun)
Annals of Combinatorics 22/4, (2018) 711-768.

Product of simplices and sets of positive density in R^d (with N. Lyall)
Math. Proc. Cambridge Phil. Soc., v 165/1, (2018) 25-51.


A Roth type theorem for dense subsets of R^d (with B. Cook, M. Pramanik)\\
Bull. London Math. Soc., v 49/4, pp. 1473-1489, 2017 )

Diophantine equations in the primes (with B. Cook)
Inventiones Math. v 198/3, (2014) 701-737.

Averages along polynomial sequences in discrete nilpotent groups: Singular Radon transforms
(with A. Ionescu, S. Wainger)\\
in Advances in Analysis: The Legacy of E. M. Stein, Princeton Univ. Press, pp. 147-188, 2014)

Constellations in P^d (with B. Cook)
Int. Math. Res. Notices (IMRN) , v.12 pp. 2794-2816, 2012)

K-point configurations in sets of positive density of Z^n
Duke Math. J., v 146/1, (2009) 1-34.

Discrete Radon transforms and applications to ergodic theory (with A.Ionescu and S. Wainger)
Acta Mathematica v.198/2, (2007) 231-298.

Discrete analogues in harmonic analysis: spherical averages (with E.M.Stein and S. Wainger)
Annals of Mathematics, v.155, (2003) 189-208.