Resilience for the Littlewood–Offord problem
Resilience for the Littlewood–Offord problem
复制标题
利特尔伍德-奥福德问题的复原力
DOI:
10.1016/j.aim.2017.08.031
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发表时间:
2017
影响因子:
1.7
通讯作者:
Kwan, Matthew
中科院分区:
文献类型:
--
作者:
Bandeira, Afonso S.;Ferber, Asaf;Kwan, Matthew
Consider the sum X (ξ)=∑ i= 1 n a i ξ i, where a=(a i) i= 1 n is a sequence of non-zero reals and ξ=(ξ i) i= 1 n is a sequence of iid Rademacher random variables (that is, Pr[ξ i= 1]= Pr[ξ i=− 1]= 1/2). The classical Littlewood–Offord problem asks for the best possible upper bound on the concentration probabilities Pr[X= x]. In this paper we study a resilience version of the Littlewood–Offord problem: how many of the ξ i is an adversary typically allowed to change without being able to force concentration on a particular value? We solve this problem asymptotically, and present a few interesting open problems.
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