Extractors for sum of two sources
Extractors for sum of two sources
复制标题
两个来源之和的提取器
DOI:
10.1145/3519935.3519963
复制
发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Liao, Jyun-Jie
中科院分区:
文献类型:
--
作者:
Chattopadhyay, Eshan;Liao, Jyun-Jie
We consider the problem of extracting randomness fromsumset sources, a general class of weak sources introduced by Chattopadhyay and Li (STOC, 2016). An (n,k,C)-sumset sourceXis a distribution on {0,1}nof the formX1+X2+ … +XC, whereXi’s are independent sources onnbits with min-entropy at leastk. Prior extractors either required the number of sourcesCto be a large constant or the min-entropykto be at least 0.51n.As our main result, we construct an explicit extractor for sumset sources in the setting ofC=2 for min-entropypoly(logn) and polynomially small error. We can further improve the min-entropy requirement to (logn) · (loglogn)1 +o(1)at the expense of worse error parameter of our extractor. We find applications of our sumset extractor for extracting randomness from other well-studied models of weak sources such as affine sources, small-space sources, and interleaved sources.Interestingly, it is unknown if a random function is an extractor for sumset sources. We use techniques from additive combinatorics to show that it is a disperser, and further prove that an affine extractor works for an interesting subclass of sumset sources which informally corresponds to the “low doubling” case (i.e., the support ofX1+X2is not much larger than 2k).
登录
查看更多内容
DOI:
10.1109/ccc.2009.36
发表时间:
2009
期刊:
2009 24th Annual IEEE Conference on Computational Complexity
影响因子:
--
作者:
Anup Rao
通讯作者:
Anup Rao
DOI:
10.1109/focs.2016.27
发表时间:
2016
期刊:
2016 IEEE 57th Annual Symposium on Foundations of Computer Science (FOCS)
影响因子:
--
作者:
Gil Cohen;L. Schulman
通讯作者:
L. Schulman
DOI:
10.1112/jlms/jdl021
发表时间:
2005
期刊:
Journal of the London Mathematical Society
影响因子:
--
作者:
B. Green;I. Ruzsa
通讯作者:
I. Ruzsa
DOI:
10.1145/3055399.3055423
发表时间:
2017
期刊:
Proceedings of the 49th Annual ACM SIGACT Symposium on Theory of Computing
影响因子:
--
作者:
Avraham Ben;Dean Doron;A. Ta
通讯作者:
A. Ta
DOI:
10.1007/978-3-030-64381-2_21
发表时间:
2020
期刊:
Cham
影响因子:
--
作者:
Chattopadhyay, Eshan;Li, Xin
通讯作者:
Li, Xin