On $p$-Spread Measures

RESUMO

We study $p$-spread probability measures on the Boolean lattice. We show that if a set family is large under the product Bernoulli-$p$ measure, then no $p$-spread measure can be supported on the family of sets not covered by the union of two of its members, answering the fractional version of Talagrand's discrete convexity problem. Consequently, we establish two comparison theorems between $p$-spread and product Bernoulli-$p$ measures.