Department of Computer Science | Institute of Theoretical Computer Science | CADMO

Theory of Combinatorial Algorithms

Prof. Emo Welzl and Prof. Bernd Gärtner

Mittagsseminar (in cooperation with M. Ghaffari, A. Steger and B. Sudakov)

Mittagsseminar Talk Information

Date and Time: Tuesday, November 22, 2016, 12:15 pm

Duration: 30 minutes

Location: CAB G51

Speaker: Matthew Kwan

Resilience for the Littlewood-Offord problem

Fix a sequence of real numbers, and consider the sum of a random subsequence of these numbers. The classical Erdos-Littlewood-Offord theorem shows that the point probabilities are small for random sums of this form (we thus say such random sums are "anti-concentrated"). Motivated by some questions about random matrices, we are interested in the "resilience" of this anti-concentration. What if we allow an adversary to make small changes to the random subsequence? How big of a change can we allow without the adversary being able to force concentration on a particular value? Joint work with Afonso Bandeira and Asaf Ferber.


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