## Explicit two-source extractors and resilient functions I

Eshan Chattopadhyay

University of Texas at Austin

September 21, 2015

We explicitly construct an extractor for two independent sources on $n$ bits, each with min-entropy at least $\log^C n$ for a large enough constant $C$. Our extractor outputs one bit and has error $n^{-\Omega(1)}$. The best previous extractor, by Bourgain, required each source to have min-entropy $.499n$. A key ingredient in our construction is an explicit construction of a monotone, almost-balanced boolean function on n bits that is resilient to coalitions of size $n^{1-\delta}$, for any $\delta > 0$.