Saturating Sperner families

Dániel Gerbner, Balázs Keszegh, Nathan Lemons, Dömötör Pálvölgyi, Cory Palmer, Balázs Patkós

Published 2011-05-23Version 1

A family $\cF \subseteq 2^{[n]}$ saturates the monotone decreasing property $\cP$ if $\cF$ satisfies $\cP$ and one cannot add any set to $\cF$ such that property $\cP$ is still satisfied by the resulting family. We address the problem of finding the minimum size of a family saturating the $k$-Sperner property and the minimum size of a family that saturates the Sperner property and that consists only of $l$-sets and $(l+1)$-sets.