We study two conjectures posed in the analysis of Boolean functions $f : \{-1, 1\}^n \to \{-1, 1\}$, in both of which, the Majority function plays a central role: the "Majority is Least Stable" (Benjamini et al., 1999) and the "Non-Interactive Correlation Distillation for Erasures" (Yang, 2004; O'Donnell and Wright, 2012). While both conjectures have been refuted in their originally stated form, we obtain a nearly tight characterization of the noise parameter regime in which each of the conjectures hold, for all $n \ge 5$. Whereas, for $n=3$, both conjectures hold in all noise parameter regimes. We state refined versions of both conjectures that we believe captures the spirit of the original conjectures.
翻译:我们研究了布尔函数分析领域中的两个猜想,其中多数函数在两个猜想中均起核心作用:“多数函数最不鲁棒性”猜想(Benjamini 等人,1999年)和“擦除信道下的非交互式相关性蒸馏”猜想(Yang,2004年;O'Donnell 和 Wright,2012年)。尽管这两个猜想在其原始表述形式下已被推翻,但我们对于所有 $n \ge 5$ 的情形,给出了每个猜想成立的噪声参数范围的近乎紧致刻画。然而,当 $n=3$ 时,这两个猜想在所有噪声参数范围内均成立。我们给出了这两个猜想的精炼版本,并相信其捕捉到了原始猜想的精髓。