When:
Tuesday, April 7, 2026
1:00 PM - 2:00 PM CT
Where: Lunt Hall, 107, 2033 Sheridan Road, Evanston, IL 60208 map it
Audience: Faculty/Staff - Student - Post Docs/Docs - Graduate Students
Contact:
Bryna Kra
(847) 491-5567
kra@math.northwestern.edu
Group: Department of Mathematics: Dynamical Systems Seminar
Category: Lectures & Meetings
Title: On the structure of infinite sumsets in the integers
Abstract: A long-standing problem in combinatorial number theory, posed by Erdős and Graham, asks for a classification of all integer subsets A and B for which d(A+B)=d(A)+d(B), where d(.) denotes the natural density in the integers. We will discuss the history and motivation of this problem, as well as recent progress toward its resolution. This talk is based on joint work with Ethan Ackelsberg.