The maximum sum of sizes of non-empty cross $t$-intersecting families

Shuang Li, Dehai Liu, Deping Song +1

Let $[n]:=\{1,2,\dots ,n\}$, and $M$ be a set of positive integers. Denote the family of all subsets of $[n]$ with sizes in $M$ by $\left(\genfrac{}{}{0ex}{}{\left[n\right]}{M}\right)$. The non-…