25-30 November 2024
Saint-Petersburg University
Europe/Moscow timezone

Random unconditional convergence of Rademacher chaos in $L_\infty$ and its applications to graph theory

26 Nov 2024, 13:05
35m
Saint-Petersburg University

Saint-Petersburg University

Department of Mathematics and Computer Sciences, Saint-Petersburg University, Saint Petersburg, 14 line V.O., 29B Yandex maps link: https://yandex.ru/maps/-/CDw2mFl9 Google maps link: https://maps.app.goo.gl/L1Nrzf81wahREKop6 ZOOM streaming at: TBA

Speakers

Sergei Astashkin (Samara National Research University) Konstantin Lykov (Institute of Mathematics of the National Academy of Sciences of Belarus)

Description

According a recent result due to the authors of this talk, both multiple Rademacher system and Rademacher chaos possess the property of random unconditional convergence in $L_\infty$. This fact combined with some novel connections between $L_\infty$-norms of linear combinations of elements of these systems and some special norms of matrices of their coefficients allows us to establish sharp two-sided estimates for the discrepancy of weighted graphs and hypergraphs. Some of these results extend the classical theorems proved by Erdös and Spencer for the unweighted case.

Primary authors

Sergei Astashkin (Samara National Research University) Konstantin Lykov (Institute of Mathematics of the National Academy of Sciences of Belarus)

Presentation Materials

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