Inverting sets and the packing problem

Vance Faber, Mark Goldberg, Emanuel Knill +1

Given a set $V$, a subset $S$, and a permutation $\pi$ of $V$, we say that $\pi$ permutes $S$ if $\pi (S)\cap S=\varnothing$. Given a collection $\cS = \{V; S_1,\ldots , S_m\}$, where $S…