A Boolean function f \colon \mathbb{F}^n_2 \rightarrow \mathbb{F}_2 is called an affine disperser for sources of dimension d, if f is not constant on any affine subspace of \mathbb{F}^n_2 of dimension at least d. Recently Ben-Sasson and Kopparty gave an explicit construction of an affine disperser for d=o(n). The main ... more >>>