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SUMMARY:Vitaly Bergelson (Ohio State University)
DTSTART:20210302T150000Z
DTEND:20210302T160000Z
DTSTAMP:20260423T040001Z
UID:OWNS/35
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/OWNS/35/">No
 rmal sets in $(\\mathbb{ℕ}\,+)$ and $(\\mathbb{N}\,\\times)$</a>\nby Vit
 aly Bergelson (Ohio State University) as part of One World Numeration semi
 nar\n\n\nAbstract\nWe will start with discussing the general idea of a nor
 mal set in a countable cancellative amenable semigroup\, which was introdu
 ced and developed in the recent paper "A fresh look at the notion of norma
 lity" (joint work with Tomas Downarowicz and Michał Misiurewicz). We will
  move then to discussing and juxtaposing combinatorial and Diophantine pro
 perties of normal sets in semigroups $(\\mathbb{ℕ}\,+)$ and $(\\mathbb{N
 }\,\\times)$. We will conclude the lecture with a brief review of some int
 eresting open problems.\n
LOCATION:https://researchseminars.org/talk/OWNS/35/
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