On the structure of infinite sumsets in the integers

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• Florian Richter (EPFL)
• Wednesday 18 March 2026, 13:30-14:30
• MR4, CMS.

If you have a question about this talk, please contact Julia Wolf.

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, its connections to ergodic theory, as well as recent progress toward its resolution. This talk is based on joint work with Ethan Ackelsberg.

This talk is part of the Discrete Analysis Seminar series.

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